The fish in that thread had a major ich attack, so maybe they were stressed out by the change in the flow in the aquarium and they got ich. Ich will attack the gills of the fish first so before there is even white spots on the fish their gills are covered with parasites, thus the heavy breathing.
I do not beleive that the problem in that thread was caused by the new pump, rather it was caused by the ich attacking the gills of the fish.
Probably the person putting a new pump stressed the fish out while doing a more extensive maintenance and work in the aquarium than usual, and since that person had ich present in the aquarium, it simply took the opportunity and spead on the fish.
I put 2 koralia evolution 1050 in my aquarium and never even washed them. No sign of any problem with my fish...but my fish don't have ich so they don't get sick at the slightest stress.
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Originally Posted by reefcat
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