Lots can go wrong with Aero but it will work if you have the right conditions. The ideal reservoir temp should be a constant 68. Almost impossible to do without a chiller. I used a 1/4 HP and it wasn't good enough. Be prepared to buy 1/2 HP chiller per unit. WARNING!!! Chillers eat up electricity. You also need to be adding hydrogen peroxide to reservoir. Room should not be above 70 as it will contribute to higher water temp. You can use tap water but store it in a separate open container for 24 hours so that chlorine can evaporate. PH must remain constant.