July 17, 2011
Hmm. He doesn't have a big Panaque or similar in there does he? Almost looks like sawdust.
Never suffered with diatoms myself but if that is what it is, then silicates in tap water are often a trigger. Soft water and low light apparently don't help. I think this advice is probably sound - http://www.aquascapingworld.co.....item_id=79
July 30, 2008
May 2, 2012
I'd have to agree with @coelacanth from what I can see in the pics. I've seen this very often in tanks when the mulm behind the HMF was left to accumulate too long and the pump or uplift tube just blew the gunk back into the tank! Happens of cause, as mentioned above, due to low circulation too.
June 13, 2011
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