fishin4cars
True friends just call me Larkin
Cape, as you have seen you have already been able to get away with this for some time with out seeing ill effects. It will take a few months for Nitrates, minerals, salts and metals to build to a point that is even noticeable to the fish. Just as it will take some time for GH and KH to be effected. Will also take quite some time for the fish to start producing Pharamones which don't start being produced until the fish are reaching maturity. Water changes aren't going to show miracles over night, weeks or, a month or two. They take long periods of time to really start showing the benefits. Probably the only thing you may see in a two month period is some slight differences in Nitrite and nitrate levels in the two tanks, and MAYBE some slight differences in PH depending on your hardness and alkalinity in your source water. The one thing you will notice on the stocking rates IF you chose to test like I suggested the tank that has the less stocking rate there will be far less stress related issues, as well as "IF" there is any parasite breakout the tank with the heavier stocking rates will start showing more siisues faster and get out of control faster than the lower stocking rate and overall better water quality.