Originally Posted by T1KARMANN
As for bleach are you sure isn't that toxic to fish?
Only if you don't dechlorinate afterwards. I still feel a bit funny about putting my purigen back into my filters after it has recharged in pool chlorine, but hey, that's how it's designed.
My neighbour had a badly neglected tank that was covered in dark algae. I gave her a couple of 2 1/2 inch bristlenose and they made that tank sparkle! Within a week all the walls and ornaments were like brand new (the neighbour had forgotten they were ever that brightly coloured). Then they set about cleaning every piece of coloured gravel. Lol. I must check that she has begun offering wafers now there is little to no algae!