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Permalink Reply by Robert Jango on June 7, 2012 at 5:26am

Soft, mineral-poor water wipes out algae. Switching over to rainwater softens your water. (Place a barrel underneath your gutter system if you have one)  Distilled water and RO water are also mineral poor. Adding floating plants like water lettuce or duckweed sucks minerals out of the water. Or you can also switch to low-light plants like Anubias,ferns, and Crypts. Low light discourage algae.

Just remember algae likes the same conditions that plants do. In mineral poor water most plants need a rich substrate or they'll suffer the same fate as the algae.  

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Permalink Reply by andrew calvo on June 7, 2012 at 9:47am

But this is a saltwater

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Permalink Reply by Robert Jango on June 7, 2012 at 11:23am

Yeah, I see it now. I don't keep saltwater tanks - sorry. 

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Permalink Reply by andrew calvo on June 7, 2012 at 12:08pm

O ok 

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