I've never ran a heater... though now that u say something that may be part of it bc of the clip on over the sump. 8 in or so above water....
And dont havethe tests bc I'm a dummy. I had some 5 yr old ones donated to me by a friend but I pitched em bc they were 5yr old...
I use sealab no 28. Blocks... though about 2 weeks before all the turmoil I'd ran out of em. I've got some now tho... it's my understanding that they only release what's needing replenished somehow....
This is the first time this many zoas have done this. I've had a couple nitrate spikes b4 due to negligence and laziness...
I do a 5 gallon wc once a week and a 15 once a month. No not both in same week.5,5,5,15.
I use reef Crystal's orange bag...
Ive quit over feeding about a month ago.
Only once a week for fish 3 for filter feeders.