Above Ground Pool Opening Checklist
Remove and clean the cover, check the liner and equipment, refill to the right level, then test and balance TA, pH, CYA, and chlorine before swimming.
Safety first
- Never mix chemicals together.
- Always add the chemical to the water — never water to the chemical.
- Wear gloves and eye protection when handling pool/spa chemicals.
- Keep chemicals out of reach of children and pets.
- Always follow the product label — it overrides any guidance here.
Before you remove the cover
- Pump standing water off the top of the cover so it doesn't run into the pool full of debris.
- Have your pump, filter, and any winterized plugs/lines ready to reconnect.
Opening checklist
- Remove, clean, and dry the cover before storing it.
- Skim out leaves and debris, then vacuum the floor if needed.
- Reconnect the pump and filter; remove winterizing plugs and check for cracked fittings.
- Check the water level against the Pool Volume Calculator — add water if it's below mid-skimmer.
- Run the filter 24/7 for the first day or two while the water clears.
- Test and fix TA first, then pH, then CYA, then shock with chlorine last — see our chemical order guide.
- Re-test daily for the first week; opening water chemistry tends to drift as things settle.
Frequently asked questions
Do I need to drain my above ground pool for the winter?
No — partially draining below the skimmer and winterizing is standard, but a full drain isn't necessary and can stress the liner.
The water is green when I uncover it. What do I do first?
Skim debris, get the filter running, and follow our green pool guide — expect a few days of shocking before it clears.
How soon can I swim after opening?
Once FC, pH, and TA are all in range and the water is clear — usually 1-3 days if the pool was closed properly.
Should I test before or after removing the winter cover?
After. Water chemistry shifts while covered, and debris/runoff falling in as you remove the cover changes things too.