Thank you for your input! The reason I was testing though is because I was told usually for Chrysophytes there are elevated silicates. I’m trying hard to get as close as I can to 100% confirmation that these are chrysophytes so I can completely switch my previous plan of attack with the dirty tank method to running GFO and cleaning the tank up a bit to beat chrysophytes.In a normal system you would get 0 on silicates test. If there are silicates diatoms for example would appear quickly. That is why silicates dosing working for Amphidinium Dinos. Diatoms replicate faster than Dinos and takes over their surface. When dinos gone you stop dosing silicates and the diatoms go in about 2 weeks as silicates is especial to their reproduction