dinos?

So tank has been up and running over a little over a year. During that year I've battled dinos twice (both being LCA dinos) by dosing phosphate and spongExcel daily and was successful. Well I recently upgraded to new lights as the par on the old light was really weak. (zoa's were stretching a...

So, brown matty stuff on sandbed (and now starting to go up the rock next to it) I tried the strain test, where I scooped up some, mixed it, strained it and let it sit in a glass. After about 30m the same stuff that's on the sandbed appeared in the glass. Got my little usb microscope on it...

Are these are diatoms or dinos ? it is a new tank however I used some rock from my old tank and most is dry rock. here’s the photos , I also used the towel method. I have a microscope coming tomorrow.