My nitrates are currently at 7ppm after dosing (dropped to 1ppm before I started dosing) and my phosphates are at 0.035ppm (spiked to 0.45ppm for a day after I siphoned 1/3 my sand).Why do you need GFO? Don’t believe everything you read online.
Chrysophytes do NOT use silica. Lowering phosphates with GFO will only make matters worse.
Keep nutrients detectable and slightly elevated. Dose sodium silica to encourage diatoms. Increase herbivores. If chrysophytes are really long, use a tooth brush or algae scraper to mow it down.
So black out and keep nutrients at these levels will defeat them?