Forget the Uaru then. The most often I would be doing w/c is weekly preferably every other week though.
I was just reading on planetcatfish that four line pims can't have ph higher than 7.2 and my tank is 7.6 should I be worried/
What if I got more filtration like a sponge filter in addition to the canister. It's not that I wouldn't do weekly w/c, I will do whatever it takes to keep the fish in perfect health, it's just not my favorite thing to do.
if the water parameters are fine then w/c per week is fine IMO with the uaru in 75 gallon,for me it works i dont know about others who may have a different filtaration or have a bad composition of fishes that produces large amount of waste etc,as its known that the uaru produces a lot of wasteForget the Uaru then. The most often I would be doing w/c is weekly preferably every other week though.