Hi all - above is my planned sump/filter .
I know that I have not included control valves or check valves because I HAVE NO IDEA WHAT I'M DOING WHEN IT COMES TO PLUMBING.
I think i can glue PVC ledges to the inside of the drum on which i can rest diffuser screens which can hold the bioballs/pot scrubbies (i initially was thinking ceramic media or extra rock but dont know how to support the weight), a big mat of filter floss removes the needs for filter socks and the plan is to have 3-5 so i can just change them out and rinse.
i have an overflow box - not a drilled tank i am hoping this will add about 25 gallons of water volume to the system