1500 gal tanks--water changes?
1500 gal tanks--water changes?
Thanks for all the input. Bioload is modest--35 fish in each tank, mostly med to large, a few smaller anthias, a couple xlarge sailfin tangs. Again, no corals! FWLR ONLY. Two tanks, each feeding into a single very large sump. My phosphate readings have been very high (8-10 on hi-read meter)--have tried many additives, mostly from Brightwell, to no avail. I'm shrugging this off, since fish have been healthy, eating well for over a year now. BUT...
still trying to get a handle on 1. How often do you recommend a water change, and 2.is a 20% water change sufficient? I currently do this every 4 weeks.