If I can safely do without, I had not planned on using LR.
Yes you can do a fish tank without LR
, although I think it is a better decoration than anything else. It will also act as a biological filter (base rock will as well).
65 gal tank, FO.
I believe the flow rate on the fluval is 100gph (will verify).
No, you should shoot for a filter capable of flowing 400-640 gph
. You'll want 5-10 X turnover per hour for effective biological filtration. Even with the addition of LR
or base rock, you would need more water movement and turn over than that. You might look into a wet/dry filter with an appropriately sized pump, or plan on adding some porous rock (LR
or base rock) and some powerheads.