Reverse UG filtration?
Guys: Just found this site and it is terrific. I have been out of this hobby for about 20 years or so and am setting up a 40 gallon fresh water tank to get back into this before moving back into salt. When I left the hobby the newest thing was to get the water flow through your UG filter flowing in reverse. At that time the set up was done by either drilling a hole in bottom of the tank and running the return water in from the bottom, or using the “lift” tubes as the entry point to send the filtered water down under the gravel. At the time some of this was done with a sump setup, long before the wet/dry stuff I am reading about or it was done direct with a canister of which I think at the time it was Eheim or nothing. My question is, can the canister filters on the market today handle this task, if so how much bigger flow rate does one need, or is having a separate water extraction and return system for this function the way to go using a sump and separate pump and then having the cani
