brown crud
Hey Taz
Sounds like you are adding something or destabilizing the bios......
If you are using RO water check the differences in the parameters of old vs new for a clue...ie phos ppt.??
Also if you are into an experiment: Float new water in a jar etc in the tank (sump) and just a few drops of old water......a biological should grow if the new water is providing eg phos or silicate (ie poss. diatoms). And the reverse floater for old water supply of pre-crud....you get my drift..
Good luck
__________________
John
its all about quality, not quantity.....
...when in doubt buy a Binford....
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