In The Swim Basic Pool Opening Kit Review for Above-Ground Pools
- AboveGroundSplash
- 6 days ago
- 9 min read
Opening a small above-ground pool is much easier when you have the main start-up chemicals ready before the cover comes off. The In The Swim Basic Pool Opening Chemical Start-Up Kit is designed for pools up to 7,500 gallons and gives you a simple bundle for starting the season.
This kit includes pool shock, clarifier, algaecide, stain and scale control, a sun sorb oil and scum absorber, and a test strip bottle. That makes it a practical choice if you want one starter kit instead of buying every opening chemical separately.
It is not the right kit for every pool, though. If your pool is larger than 7,500 gallons, very green, badly neglected, or needs heavy cleanup, you may need a larger kit or extra chemicals.
Quick verdict: Is the In The Swim Pool Opening Kit worth it?
The In The Swim Basic Pool Opening Kit is a good fit for small above-ground pools up to 7,500 gallons that need a straightforward seasonal opening kit. It covers the main opening jobs: shocking, clarifying, algae prevention, stain control, and basic testing.
Its biggest advantage is convenience. Instead of guessing which individual chemicals to buy, you get a ready-made starter bundle for smaller pools.
Its main limitation is size. This is the basic kit, so it is not the best choice for larger pools, heavy algae cleanup, or pools that need a full recovery process after being left untreated.
Best for: small above-ground pools up to 7,500 gallons
Not best for: large pools, swampy green water, or owners who need a full-season chemical supply
In The Swim Basic Pool Opening Kit specs at a glance
The In The Swim Basic Pool Opening Kit is best viewed as a compact start-up chemical bundle for smaller above-ground pools up to 7,500 gallons. It gives you the main opening products in one box: shock, clarifier, algaecide, stain prevention, oil/scum control, and test strips.
It is not the right kit for larger pools, heavy algae cleanup, or pools that need major chemical correction. But if your pool is small, mostly clear, and you want a simple opening kit instead of buying several products separately, this package makes sense.
For best results, test the water first, follow the product label directions, and use the kit as part of a proper pool-opening routine — not as a replacement for balancing pH, alkalinity, chlorine, or filtration.
What comes in the In The Swim Basic Pool Opening Kit?
The In The Swim Basic Pool Opening Kit is made for smaller pools up to 7,500 gallons. It gives you the core opening chemicals needed to help get the water cleaned, treated, and ready for balancing.
The kit includes:
Di-Zap shock treatment
This is the main sanitizer boost in the kit. It helps raise chlorine quickly at opening so the water can start clearing after winter or early-season buildup.
Pool clarifier
Clarifier helps small suspended particles clump together so your filter can catch them more easily. This is useful if the water looks dull, hazy, or slightly cloudy after opening.
Algaecide
The included algaecide helps prevent algae from taking hold as the pool starts running again. It should be viewed as a support product, not a replacement for shock, brushing, filtration, and balanced chlorine.
Spring Stain Away
This helps control metals, scale, and staining issues that can show up when opening a pool, especially if the water has been sitting under a cover.
Sun Sorb oil and scum absorber
The included sun-shaped absorber helps collect oils, lotions, body oils, and surface scum that can build up in pool water.
Test strip bottle
The kit also includes test strips, which are useful for checking your water before and after opening chemicals are added.
What the In The Swim Basic Opening Kit does well
The biggest strength of this kit is simplicity. It gives small above-ground pool owners a ready-made chemical bundle instead of forcing you to buy shock, clarifier, algaecide, stain control, and testing supplies separately.
It is sized for smaller above-ground pools
This specific Basic kit is intended for pools up to 7,500 gallons. That makes it a better match for smaller round, rectangular, or metal-frame above-ground pools than oversized kits designed for 15,000 to 35,000 gallons.
If your pool is close to or above 7,500 gallons, do not stretch this kit too far. Choose the correct kit size or buy extra chemicals based on your actual pool volume.
It covers the main opening jobs
A good pool opening usually needs more than one product. You may need to test the water, shock the pool, filter continuously, treat early cloudiness, prevent algae, and clean up surface oils or residue.
This kit helps cover those jobs in one bundle. That is why it works best for seasonal pool owners who want a straightforward start-up process without overcomplicating the opening routine.
It helps with cloudy opening water
Pool water often looks dull or cloudy when first opened. The included clarifier can help after the water has been shocked and the filter is running, especially when tiny particles are still suspended in the water.
Clarifier is not magic, though. If the filter is dirty, the pH is wrong, or the water is full of algae, clarifier alone will not fix the problem. If the pool stays cloudy after opening, follow our guide on how to fix cloudy pool water before adding more chemicals.
It includes algae support
The included algaecide gives extra support during opening, especially if your pool has been covered for months or exposed to organic debris.
But this is important: algaecide is not the main fix for a badly green pool. If the water is already green, you need to test, balance, brush, shock, filter, clean, and vacuum properly.
How to use the In The Swim Basic Pool Opening Kit
Always follow the product label directions first. Pool chemicals are strong, and the correct order matters.
Step 1: Remove debris and clean the pool
Before adding opening chemicals, remove leaves, dirt, bugs, and visible debris from the pool. Empty the skimmer basket, clean around the waterline, and brush the pool walls and floor.
The cleaner the pool is before treatment, the easier it is for the chemicals and filter to work.
Step 2: Start the pump and check the filter
Run the pump and make sure water is circulating properly. Clean or backwash the filter before you begin if it is dirty.
Opening chemicals work much better when the pool is circulating and the filter is able to remove dead algae, fine particles, and cloudy residue.
Step 3: Test the water
Use the included test strips to check your chlorine, pH, alkalinity, and stabilizer levels before adding chemicals.
Do not guess. If the pH is too high or too low, chlorine may not work properly and the pool may take longer to clear.
Step 4: Add the shock treatment
Add the included Di-Zap shock according to the label directions. Shock is usually best added in the evening or when direct sunlight is lower, with the pump running.
This helps raise sanitizer levels and begin breaking down organic buildup in the water.
Step 5: Add stain control, clarifier, and algaecide as directed
After shocking and circulating, use the included support products according to the product instructions. The stain control helps with metals and scale, the clarifier helps with fine particles, and the algaecide helps discourage algae growth.
Do not overdose or add products randomly. Follow the order and dosage on the packaging.
Step 6: Keep the pump running and retest
After adding opening chemicals, keep the pump running so the water can circulate and filter properly. Retest the water before swimming and adjust chlorine, pH, and alkalinity as needed.
The pool is not ready just because chemicals have been added. It is ready when the water is clear, the chlorine is in the safe range, and the chemistry is balanced.
Who should buy the In The Swim Basic Pool Opening Kit?
Choose this kit if you have a smaller above-ground pool and want a simple opening bundle instead of buying separate products one by one.
It is a good fit if:
You have a pool up to 7,500 gallons.
You want a basic start-up chemical kit.
Your pool is not severely green or neglected.
You want shock, clarifier, algaecide, stain control, and test strips in one bundle.
You are opening a seasonal above-ground pool.
You want a simple option for early-season water care.
This kit makes the most sense for pool owners who want convenience and a clean opening process without buying a much larger kit than they need.
Who should skip it?
Skip this kit if your pool is larger than 7,500 gallons or if your water needs serious recovery.
You should look elsewhere if:
Your pool is closer to 15,000 gallons.
Your pool is badly green or swampy.
You need a heavy-duty algae cleanup process.
You already have most of the included chemicals.
You want a full-season chemical supply.
You prefer to buy shock, algaecide, clarifier, and test products separately.
For larger pools, the Basic kit is too limited. You would be better comparing it with the larger In The Swim opening kits instead.
In The Swim Basic vs larger opening kits
The Basic kit is the right choice only if your pool size matches it. Buying a kit that is too small can leave you short on shock, clarifier, or algae treatment during opening.
Is the Basic kit enough for a green pool?
Not always. If your pool has a light green tint or early algae growth, the kit may help as part of the opening process. But if the pool is dark green, swampy, or full of debris, do not rely on this kit alone.
A badly green pool usually needs a proper cleanup process:
Test and balance the water.
Brush the pool walls and floor.
Shock the pool properly.
Run the pump continuously.
Clean or backwash the filter.
Vacuum dead algae.
Retest before swimming.
The In The Swim Basic Opening Kit is better for routine seasonal opening than rescuing a neglected pool.
What you may still need alongside this kit
The Basic kit gives you the main opening chemicals, but it does not replace every pool care item.
You may still need:
A pool brush for brushing walls, corners, seams, and the floor.
A skimmer net for removing leaves and floating debris.
A pool vacuum for removing settled dirt and dead algae.
Extra shock if the pool is very dirty or larger than expected.
pH increaser or pH decreaser if your water is out of range.
Alkalinity increaser if your alkalinity is low.
Replacement filter cartridges or clean sand if filtration is weak.
The kit is a strong starting point, but water testing should still guide what you add next.
Final verdict
The In The Swim Basic Pool Opening Chemical Start-Up Kit is a sensible choice for small above-ground pools up to 7,500 gallons. It gives you shock, clarifier, algaecide, stain control, a scum absorber, and test strips in one opening bundle.
It is best for pool owners who want a simple seasonal start-up kit and do not want to buy each chemical separately.
Do not overestimate it, though. If your pool is larger, badly green, or has serious water problems, you will need more than this Basic kit. Match the kit to your pool size, test your water before and after treatment, and keep the pump running long enough for the chemicals and filter to do their job.
Related pool opening and water care guides
If you are opening your pool for the season or trying to fix cloudy or algae-prone water, these guides can help you choose the right next step:
👉 Pool Opening Guide for Above-Ground Pools — use this if you want a full step-by-step opening process before adding chemicals.
👉 How to Clear Cloudy Pool Water — helpful if your pool opens dull, hazy, or milky after winter.
👉 How to Clear a Green Above-Ground Pool — use this if the water has visible algae or has turned green before opening.
👉 Pool Shock 101 — explains when to shock, how shock works, and the mistakes to avoid.
👉 Pool Volume & Chlorine Dosage Calculator — use this to estimate your pool gallons before adding shock, chlorine, or other chemicals.
👉 Chemicals & Water Care — best starting point if you want to compare pool shock, chlorine tablets, algaecide, test strips, and other water care products.
The questions below cover the main buying concerns for this specific Basic kit, especially pool size, contents, green water, and whether you still need chlorine after opening.
FAQ: In The Swim Basic Pool Opening Kit
What pool size is the In The Swim Basic Pool Opening Kit for?
The In The Swim Basic Pool Opening Kit is designed for pools up to 7,500 gallons. If your pool is larger than that, choose a larger kit or buy additional chemicals based on your actual pool volume.
What comes in the In The Swim Basic Pool Opening Kit?
The Basic kit includes Di-Zap shock treatment, pool clarifier, algaecide, Spring Stain Away, a sun sorb oil and scum absorber, and test strips.
Is this kit enough to open a green pool?
It may help with light algae or normal seasonal opening, but it should not be treated as a complete fix for a badly green or neglected pool. A green pool usually needs testing, balancing, brushing, shocking, filtration, and vacuuming.
Does the kit include test strips?
Yes, the Basic kit includes a test strip bottle, which helps you check your water before and after opening chemicals are added.
Can I use this kit for an above-ground pool?
Yes, this kit can be used for above-ground pools, especially smaller pools up to 7,500 gallons. It is a practical option for seasonal pool opening.
Do I still need chlorine after using this kit?
Yes. This kit helps with opening, but it does not replace ongoing chlorine maintenance. After the pool is open and balanced, you still need to maintain proper sanitizer levels.
Should I buy the Basic, Deluxe, or Super kit?
Choose the Basic kit for pools up to 7,500 gallons. Choose a larger kit if your pool is closer to 15,000 gallons or 35,000 gallons. Do not use a smaller kit for a larger pool and expect the same results.
Comments