In answer to a few posts, I've checked my testing kit, twice, not the issue. I have no problem getting a reading on nitrates after a heavy dose, but the next morning its back to zero. I'll keep dosing at the rates I'm doing, but it just seems so excessive and possibly getting worse. I'm trying to figure out the WHY! Fish load is ten full size platinum angelfish, four L144 plecos almost full grown, and a half dozen electric blue rams. I've also attempted to keep nerite snails in this tank on three occasions, not that algae has been an issue, but something is killing those off as well. I'm using well water and treating for heavy metals, so can't figure that one out either. Originally I was mixing 50/50 RO water with my well water and the snails did fine, but have since just been using well water exclusively and the snails won't last a day now. The fish are doing great, constantly spawning and even have about 100 EBR fry in my 29 gallon quarantine tank right now. I feed twice per day, once by auto feeder and once at night that is usually a treat.
I'll post some pictures later if that helps.
Also, keep in mind I have a 30 gallon sump plus I'm running a canister filter, so my total volume is closer to 150.