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Yup. That is how I’d describe them.Blurry but looks like dinos. Are they moving around like little robot vacuums?
Yup, characterized as no bubbles and rarely grow on anything else. Sometimes confused as diatomsYeah, that's them. Check that guide posted above and it should help you. Probably amphidinium if they are on the sand.
I’m pretty sure I’ve had them before in my old tanks. Very similar. I just let the tanks get dirty over time, no water changes, dosed bacteria, and used UV and h2o2 which may not work for this type.My best suggestion would be to not do anything to drastic, too quickly to fight them. There are things you can do, but some may work and some may not. I semi-crashed my tank, lost a few fish, and shut it down after doing too much, too quickly. Accept them as a phase in your system and work on making small adjustments to beat them over time. Don't believe anyone that says you can beat them in 7 days, just do these steps, etc.
is it possible to have a few?compare movement to ostreopsis. Some of the cells look very much like ostreopsis to me.
Yes. Multiple types occur in our tanks and in wild samples.is it possible to have a few?
Agree. The larger cell in these videos moves like large cell amphidinium or prorocentrum. (They have the same rhoomba-like motion)Like a rhomba
So UV may help if there are a few types. I’ve been running that and letting algae grow in tank for about a week. They don’t seem to be getting worse.Yes. Multiple types occur in our tanks and in wild samples.
Agree. The larger cell in these videos moves like large cell amphidinium or prorocentrum. (They have the same rhoomba-like motion)