Is it true that canister filters cause hole in the head for cichlids and bio-wheel filters don't? I am using a canister filter for my oscar (without carbon) and the hole in the head doesn't seem to be healing. Could this be from the canister filter? I am using metro and feeding hikari cichlid gold and doing regular water changes with water conditioner and using aquarium salt with the water temp at 83 degrees for faster healing.
Why would a canister filter promote hole-in-the-head disease? High water quality is essential to help prevent hole-in-the-head disease, so as long as you are cleaning your tank regularly and changing your filters, you should not have a problem. Also note the PH quality and water hardness because if the PH is high (excessively alkaline) and the water is hard, this tends to put more strain on New World cichlids because most of this type of cichlids are native to softer water, although not all of them. I hope this helps!
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