No water evaporation, no worry about water change, no problems. Eshopps give you a perfect reservoir tank for your aquarium tank. The Pacific is a translucent blue in color, so it will fit nicely with your set-up and comes with plenty of features to keep your aquarium tank in perfect condition in the heat. Another neat feature is the built-in float valve, which attaches to your water source via a 1/4" tubing to replenish evaporated aquarium water. Available in two sizes.