gmac
Aquarium Advice Regular
I have a Fluval 3+ Underwater Filter. When I was setting up the filter there is the main nozzle and above that there is a little hole which has a plastic cap that I can block it with if I want. I also got I think it was a Venturi thing? which I can put into it instead and allows me to turn it and change the speed I think that way. I'm not sure why it is there though? Why have a stopper for it and a venturi turning thing?
Many thanks.
Many thanks.