Hey guys, been refered by many from r2r to check out this site on possibly helping me with a problem i have with my tank. I for some reason cant grow chaeto... And also i am starting to have red spots in my sand possible cyano. So instead of my usually bi-weekly water changes i have started doing weekly changes (tank is 120 gallons with a 36 gallon sump) Im looking to do the Uas up flow method of the scrubber. I usually feed my fish once a day.. A pinch full of pellets one day and 1 romain lettuce stalk the other day and rotate. So im the type of person thats like if ima make this thing.. I wont make it small I'll make it like big lol, my fuge glass part of the sump is about a 10 inch tall (base to water line)and 12 inch long. So i wouldn't mind making it that size... Too much? Go smaller? And im also wondering instead of the airline tubing and the a booting noise of the air pump.. Would it be possible for me to possibly get a maxi jet pump and jus use the air line attachment to blast bubbles into the scrubber? Is micro bubbles ok for a scrubber or does it have to b like big globs? I even have a pump which i used for a diy skimmer that blasts micro bubbles like crazy.