Nano Reef Aquarium

As promised a while back I would review this auto top up unit. All I can can say is it is faultless, works with no problems. Just set and forget!! Just remember to keep your top up reserve tank topped every week or so, depending on it's capacity. The only indication of it been there is the small hum from the pump when it is activated. I would say though this top up unit would only be suitable for nano style aquariums and maybe a little bigger. For big aquariums maybe you would need something with a bigger, better pump.