Hello fellow reefers. I beat small cell amphidinium 6 months ago via sponge excel , raising nitrates and phosphates to outcompete with GHA. Got GHA under control and BOOM dinos are back but I believe they are large cell now from what I can tell via microscope. I believe my problem may be I am used to having 65g or larger tank but now have waterbox15 nano . I am used to there always being nitrates and phosphates because of larger water volume and I think I am bottoming those out with a nano. Getting rid of the GHA was a nightmare and killed alot of corals. I am hesitant to go this route again because the GHA is hard to get under control even with a good CUC in this nano. Should I pull all the sand a bit at a time , go barebottom then introduce new sand after a while ? I have a deep sand bed now. These dinos are driving me nuts.