We at Xenon recommend a step filter. 1st step is a mesh filter starting with 110 then 156 then 230 and finally 280. Next is river rock then sand then lump wood charcoal and finally wood ash from the grill.
Any drawings Sonny? And thinks for not trying to sell a product in your reply. ;)
No drawing. Basically the substrates are in 5 gallon buckets from Home depot. Gravity fed through 4" pvc. in top out bottom of all but the last one. That is in bottom out top. 1" drop per 2' of run. I would hope one would buy the mesh from me. ;) ;) :o :o