g.p.

What type of gravel are you using? Have you tried multiple types and picked a favorite? Going to be setting one of these up in short order. Thanks for sharing all of this - my fish will be thanking you 😃 Edit: I saw the lava rock / pea gravel comparison. I didn't know what type of pea gravel though - I saw a local place sells different types of pea gravel. And not sure if there are different sizes of pea gravel. Hoping to get it right the first go around. Thanks! Edit 2: This one is probably comparable everywhere. Did you use something like this from Home Depot? It is listed as "Bagged Pea Gravel Pebble Landscape Rock" and says the average rock size is 0.5 in to 1.5 in. I've also seen some called "smooth river rock" which seems to be smoother and rounder than the picture for this item.

What is the purpose of the PVC adapter on the top of the blackworm tower? Also, I saw that you were covering the outdoor culture tanks in large mesh netting. How do you keep pests and small predators from getting into the blackworm culture? Does it grow mosquitos? I tried an outdoor crayfish tank and ended up with a tremendous number of snails, tadpoles, and also frogs eating the crayfish. Thanks!