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  • Tank mates for koi angelfish?

    I have a couple of koi angels that seem to attack new additions to the tank. Recently, several barbs bit the dust. The koi's are nipping and biting their fins. Murderous thugs!

    I'd like to add additional fish to the tank, but what? 30 gal tank, koi's are 2 or 3 years old.

    2 AnswersFish8 years ago

  • Need to Remove Sludge from Community Tank?

    What product can I use or what action can I take to reduce or eliminate sludge from my 30 gal community tank? Water quality is good, but I seem to develop sludge heavily on the water filter (Penguin 200) bio wheel, etc. Fish are all active and healthy, and have been for a long time. Only reading that's a bit off is the ph, at 6 or a small tad more. Just added a chunk of coral and it's still at 6. Anyway, what say ye?

    3 AnswersFish10 years ago