I’ve between fighting a green pool the whole summer. It’s a 18x48 with a 1.5 hp sand filter. Here are my latest tests. Added 4 gallons of liquid chlorine last night and woke up to it less green.
First thing to do is order a recommended test kit. Link-->Test Kits Compared
Add 5ppm of liquid chlorine PER DAY, until your kit arrives. Don't add anything else.
You will need the kit to SLAM the pool. Use the SLAM process and it will clear your pool. Print it out and read it thoroughly while you wait for the kit. Link-->SLAM Process
When the kit arrives, post a full set of results and start the SLAM process.
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