This is a great top off unit, works excellent, instructions aren't great. I enquired about a spare pump for it but never got a reply so if anybody knows of an alternative or anyone else that sells them i'd be greatful thanks

Forget about those more expensive ATO that you have to add a separate pump for. This compace unit works great in my 2 biocube 29 tanks. I have two Hydor units that use Tomy pumps, but I wouldn't hesitate to replace them with this product when they go out.

Just what I wanted and much cheaper than others. Instructions are not great but it's easy enough to figure out.

Exellent ATO on a budget. Actually the same product as a more expensive name of this product. Easy assebly and it works

excelnte producto, un poco complicado para entenderlo a la primera, pero funciona perfecto

Excelente producto calidad precio. El único que le veo es que la manguera deL agua en el montaje siempre tiene que estar por arriba del deposito de agua sino hará de vaso comunicante .Muy recomendable y producto esencial para nuestros acuarios marinos

Gostei muito atendeu minhas expectativas!!

This is an excellent choice if you are on a budget...works just as described...plug it in and walk away....its that simple! It really works great!!

Пользуюсь этим девайсом 1,5 года. Работает безотказно. дозирует очень точно. Рекомендую всем.