I live In South Florida and our tap water is crap! If I were to just do a water change and add fresh tap water to an aquarium it is pretty much a gurantee that the fish would slowly die as there is a lot of chemicals in the tap water so I have to always buy a bottle of prime or tap water conditoner but prices are increasing. I pour about 2 or 3 capfuls in each bucket before I refill the tank,. Do you think 1/2 capfuls are enough? I think if I did 1/2 capfuls my prime would last longer.