Johnt on the UR site: "I feed heavy and don't do water changes, so there's quite a bio load to balance; since adding the scrubber I've stopped using phosphate remover, and levels remain low and the water appears clearer, but I think the biggest difference has been how clean the tank looks despite being set up close to five years."
brianhellno on the MFK site: "I've had a scrubber set up on my Piranha tank for a few months now and Nitrate has been zero every time I've tested it. At first the scrubber grew huge amounts of this brown grease-like algae, and now it just has a slow steady growth of solid green. I clean it about once a week or whenever the green algae starts to look like its getting a little too dense. I wanted to test the ability of the scrubber to see how well it handles a worst case scenario. I didn't change out the water for a week (the longest ever) and I left in uneaten food that made its way to the bottom of the tank. At the end of the week 0 ammonia 0 nitrite and only 5 PPM Nitrate. Simply amazing. I'm not quite sure why I change the water out anymore."