I been playing with different designs over the last couple of months, I think I'm staying with this one.
This is after 2 weeks
Using 5050 SMD LEDs from super bright 20 625nm Red and 4 470nm Blue per side
feeding is 2 cubes and screen is 6 x 8 fed from overflow
I just added an air stone inside the feed tube, see if that helps any









Scrapings from 1 side of screen