Good morning,
I have stated in several previous posts, dating back over several months to a year or more, that I never wanted to run elevated N03. Unfortunately, something in the 90 gallon locked them in, I am of belief that rock, and sand both were saturated with both N03 and P04. That said, I still maintained good color and growth, but ONLY water changes lowered.
Once the sand was removed, I saw #'s that I hadn't seen in quite a spell, finally both N03 and P04 seemed more manageable. Unfortunately, pulling the sand shifted the biome, and the "D" word swiftly followed. That word is not allowed in my home, lol...
My new system was tested yesterday, and I saw my lowest #'s yet, 7ppm N03, and 0.00 ppm P04. I immediately dosed 5ml of phosphorus and will test today, 24 hours later. I am curious to see the P04, and will not test N03 until normal test day, Saturday. For now, I will test P04 daily along side alk.
I do think that the colors will likely shift to more pastel, which I actually prefer, but many hobbyist have complimented my deeply saturated colors for years, so I kind of gave up on the pastel look, lol. It's achieved by low n03 and p04, along side heavy metal dosing. I don't think these are starving corals, just what the new indoctrinated belief system has shifted to, that corals die with zero nutrients and pastel is bleaching....
Cheers
Very good. Yes, I agree removing the sand can definitely help lower the NO3 especially when the rock and sand are leaching. Maybe you just got some rich sand. Either way, I’m glad you got it out. I think it’s better to have tighter control over the nutrients because you can experiment more.