"Robert" wrote in message
...
Is there a "best" level for the water inlet to an aquarium?
Specifically, does it matter whether the inlet is above or below the
water level.? Could you please tell me the pros and cons, (if any)?

(For simplicity, please assume that all filtration (both mechanical
and biological), and aeration take place outside the tank, and that
they are all "adequate".)

Thank you very much,
Robert

Below the water (if the inlet is above the water, the filter stops ;~)
.... so I guess you're talking about the return to the tank (not the
intake or inlet).

Position according to your requirements. If you only have the one filter
(ie: single canister) and are not CO2 injected, then the return is
typically located an inch or two below the waterline, (low enough to be
silent, high enough to pull some of the protein layer off the top),
pointed at an angle, opposite the location of the intake (typically but
this varies by setup) Depending on your landscaping (large plants,
rockwork collecting detritus etc), tank size, gph and the types of fish
(long cylindrical swimmers or slow flat cruisers), the optimal locations
may vary a lot (imo).
--
www.NetMax.tk