heres water parameters.
ph 6.3 confirmed with digital ph pen.
gh 12? i added ferts about an hour before test
the fish seem perfectly fine now. i think it was just my co2 yesterday, noticed it was flying a little bit higher today, probably from when i accidently dropped the cylinder landed on the needle valve. turned it down, all fish are swimming happily and the harlequins are not shy at all. top stays on the tank until all variables are verified thanks.