Found a bunch of interesting looking stuff while looking at my Dino problem... curious what they are, especially the first purple and green one. I scraped this off the glass today. It was a thick brown patch but doesn’t look like Dino on the sand bed. The last picture came from the sand bed and is positively amphidinium. I’m watching to see if there’s increase in different algae like diatom after dosing nitrate. So if u know what these are; or where to find an ID page for microscopic images, please let me know