Hi, have a 110l tank with fish n some softies, noticed this white sponge growing, have been following it's progress. It is now growing a couple of dark green 'arms.' friend or foe?
(Apologies for the poor quality photo)
Hi! Thanks for the replies. My lights are off now will take a photo in the morning. Am aware of needing to bring my nitrates/phosphates down,
Have got some rowaphos on the way to help and daily water changes have been helping too.
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