Have you been backwashing the filter regularly? What does the backwash water look like, is it very dirty?
It would be a huge help if you had a FAS-DPD chlorine test. That is the only way you can be sure all of the algae is dead when the water isn't clearing up. You could easily be using way too little, or way to much, chlorine with your current test. The FAS-DPD test will more than pay for it's self in saved chemicals.
It would be a huge help if you had a FAS-DPD chlorine test. That is the only way you can be sure all of the algae is dead when the water isn't clearing up. You could easily be using way too little, or way to much, chlorine with your current test. The FAS-DPD test will more than pay for it's self in saved chemicals.