Algae ID? Diatom, cyano, dino

Cbones1979

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7AC2AF96-ACFC-4366-99AD-354B4CB141BE.jpeg
88E92469-73BF-411C-AC3B-48F7EA2BA762.jpeg 8E611B0A-2BC4-4370-9A28-E859A2FBCCDA.jpeg F94562E8-9D4B-47A9-B873-2C7664560DCB.jpeg
 

thedon986

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Yeah, that's them. Check that guide posted above and it should help you. Probably amphidinium if they are on the sand.
 
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Cbones1979

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Yeah, that's them. Check that guide posted above and it should help you. Probably amphidinium if they are on the sand.
Yup, characterized as no bubbles and rarely grow on anything else. Sometimes confused as diatoms
 

thedon986

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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.
 
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Cbones1979

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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.
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.
 

taricha

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compare movement to ostreopsis. Some of the cells look very much like ostreopsis to me.
 
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Cbones1979

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Very odd my nutrients never bottomed out (using Hanna checkers) so confused as to how I got here.
 

taricha

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Cbones1979

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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)
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.

is siphoning through a filter sock still a possible solution? Does that remove any good bacteria or algae?

thanks for the help
 

taricha

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Agree that uv and filtering both are good steps, because like you say multiple types co-occur.
 

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