I believe I have a mixture I diatoms and cyano. I can clean it up by blowing it off the rocks and fishing it out and sucking it up from the sand bed. I have a mixture of snails. Astrea, nerite, cerith, nassarius, turbos, 2 urchins for my cuc. I have 2 clowns, 4 cardinals, fox face, and an orchid dotty back. It's a 75g dt with about 15 gallons in my sump. I use rodi and coral pro that
measures 0 phos and nitrate. I have not been able to get a measurable amount of nitrate since my water change after the cycle completed approximately 2 months ago. I was getting a phosphate reading of .4 in the beginning. Now both are reading zero. Testing with red sea kits and checking the test with api and salifert to confirm zero. I added chemipure blue, Dr Tim's Waste Away gel(low flow area) and a bag of carbon to a high flow area of the sump appropriately 1 month ago. 3 days ago I added a bag of phosguard and moved both that and chemipure to the media cups. I was feeding like a drunken sailor at 1 cube a day. I have rectified that to a pinch of xsmall pellets and flake. Substituting the flake every other day with 1/4 cube of mysis about a month ago. I can clean this and the sand and it about a day and a half it'd like I was never there. Any suggestions would be helpful as I would very much like to not spend like 2 hrs cleaning this every other day. Pictures were taken under white light only.