Considering a bubble magnus...which one to get?

[fraggalrock]

Any ideas about model I should get and what can
I expect to pay? I am running a 90 gallon with a 40 gallon
custom sump,possible future plans of going bigger but not
for a long time.ideas and feedback welcomed
also noticed these all over eBay

Sherry

[burrows14]

I would go with the nac7 cone. I ran it in my 120 and was very happy with it IMO Its perfect for a medium to heavily stocked 90 gallon. thay go for around $250