What is the most useful or most effective item in your fish room (aquarium) which you value the most... apart from my stepladder in the fish room, this blower is my best find since I started with fish.... I've used numerous (very expensive) diapragm air pumps, which needs replacement or fixing after only a few months. Since using this blower, (currently feeding 23 tanks - with a blow-off) I have never had a shortage of aggitation in any of my tanks.
All tanks have more than enough aeration (as below)
All tanks have more than enough aeration (as below)


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