Review on DIGITEN Upgraded Refiller Automatic Aquarium by Heidi Smith

This product is amazing for what you pay for! I would give it five stars except on one occasion when it almost flooded my tank from grabbing the siphon and not stopping and for the bulkiness of its mount. My advice: always keep the hose above the level of the water source. Submerge your pump in water (about an inch or two below the surface) so that if it doesn't stop flowing while you're away, it at least dries up rather than flooding your aquarium. If you have a sump, place it in the return pump compartment as well, since that's where the water level fluctuations occur. After a few months I am satisfied. Many build in a float mechanism as salt can build up and cause it to stick (I haven't got it yet), but if you keep the pump deep enough to last a day or so, due to evaporative losses, you should be safe.