One huge difference . Water changes ….Corals are kicking my butt recently, so I think you know how I feel. haha!
I am only capable of doing 30 gal water change whether it’s on the old 90 or the 230
and the 230 seams to seams to have matured a lot minimizing the nutrient issues from everything .
I’m trying one last attempt as soon as I get the red cyano and gha under control . And the Alk back to where I want it
Stability is key … but my issue was adjusting stability from the 90 which could grow any coral without any issues . I didn’t even have to try hard to make them grow . This tank … I believe it’s cursed from my years of good luck