How to remove the red algae in reef tank
We have had our reef tank for about a month and a couple of weeks. For the last two weeks we get red algae on our live sand; after we remove them, they reappear after less than two hours. Attached photographs show how does it look like.
How do we remove them forever?
Please note that all our corals do very well and all water tests are OK.
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That's not algae, those are diatoms. That is part of the natural cycling process and are usually an indicator of high bacteria if you are dosing carbon (it's feeding on the excess bacteria) or disoolved solids (TDS) in your water.
If you are dosing carbon, cut it back slowly (or if using bio-pellets, you might be using too much). For a tank that's not mature, any carbon doing should be minimal.
You should also take a close look at the water quality you're adding to the tank for water changes and top-off. Anything above 0 TDS will provide food for the diatoms. Make sure your are using RO water that is pure (run through DI) and the DI is not spent.
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