Okay thank you!Betta'sAnonymous said:I have white gravel that does this. I really notice it when i start getting algae on the sides by the gravel line. Looks much better after i clean. As far as the rest, i just vac like normal and cleaner rocks come to the surface. After awhile though seems like the friction from the rocks tumbling together plus the water seems to get them clean(er) over time.
Thank youmimo91088 said:In my opinion as long as you don't have problem algae growth elsewhere, then when the substrate turns all sorts of brown and green it's just a sign of a healthy ecosystem. I don't use gravel anymore, but when I did I'd just let all those microorganisms thrive and never cleaned it more than an occasional gravel vac.