Big Al I just like the high flow concept. My main intent for this bb refugium is for nutrient export. Seems ,the more water flow thru it the faster the Chaeto grows. I do see a lot of bugs in it. Now how to get mega Macro growth for removal & still promote the bug's growth is another matter. Possible to have both? I can't pull hand fulls of Macro out without hurting the bug population. I have a few ideas for this I'll throw by ya'll soon.
Miss Woodstock ,This plywood sump has been holding water for close to 4 years now. The saltwater has taken it's toll however. We will see how long it holds together. I found a few old pics.
Made of 1/2 " plywood ,65 by 17 by 17 the edges were glued with 3M 5200 Marine sealant & screwed together with galvanized deck screws. The 5200 caulk is some bad stuff! I should have used stainless screws as I see some corrosion around the edges. I added top braces later as there was a little bowing.
I used this two part epoxy paint. After more than several coats it cured rockhard & watertight. An important note, I didn't heed the directions concerning proper ventilation & need for a respirator. The fumes were bad news folks.
I needed the sump to be as large as possible & just couldn't afford a custom acrylic. Ok I've rambled enough for now.