True Union Swing Check Valve - 1 inch Slip x 1 inch Slip - An inexpensive safety device every aquarist should have!

Maggie Muffler Overflow Silencer - The Maggie Muffler reduces overflow noise on overflow standpipes and includes a Patent Pending "Snail Guard" to reduce the chance of snails getting into, and clogging, the overflow. Easily slips onto standpipes without changing the water level and is easily removed and taken apart for cleaning.