No, Do not use other copper based products with PoolRx. (You won’t need to, but more importantly, you don’t want to saturate the water) If your copper reading before adding PoolRx is at 0.2ppm or less, it’s OK to add PoolRx. If above 0.2ppm then address that issue first before installing PoolRx. Note: PoolRx is adding the right amount of specially chelated copper, at the right time, the minerals are rejuvenated when they pass over the specially treated alloy cylinder and the minerals are used up and filtered out over time, so we never get to a saturation point when used as directed. Keep in mind, if you do saturate the water, it won’t be the chelated minerals that fall out do to pH fluctuation or over oxidation, it will be the free non chelated copper that will cause the problem. Once PoolRx is ‘in solution’ it will not ‘fall out’. Understand that if you ‘overdose’ the pool with PoolRx, the minerals will not have room to dissolve ‘into solution’ and can stay in granular form. They will settle to the bottom or stick to the scale. (See question 12 and 25)