Well the first one isn't even an aquarium one, the second, I don't really know, I am really biased toward eheims, but they're pricy. Maybe try to look used? I particularly don't like the fluval x05 series, the hoses had a tendency to pop off and were a pain in general.
Aim for maybe 8-10x turnover rate but more important is the media capacity, hence my recommending canisters and aquaclears. A filter rated for 75g isn't going to be nearly enough. My sanchezi.
When the piranhas are full grown how many do you plan to keep? I'd suggest 3, 4 tops.
Aim for maybe 8-10x turnover rate but more important is the media capacity, hence my recommending canisters and aquaclears. A filter rated for 75g isn't going to be nearly enough. My sanchezi.
When the piranhas are full grown how many do you plan to keep? I'd suggest 3, 4 tops.