sneakyx16 I'm no pro but have been growing with under current and H&G for a while. I don't have all the answers but have made a lot of mistake and learned a lot. Out of all the products to help with root rot and slime I think watermax from clean grow works the best. If you have root rot the best product is is regen-a-root by cx hydroponics. This product makes the plant drop new roots. I find this product works better in my setup than the h&g roots excel. I have a large pond master air pump feeding air injection technology spider stones. I find these give off a ton of air and are easy to clean. I think the best way to clean it is to pump it down and vacuum it out, refill and add in 29% hydrogen peroxide I try to run it for 24hrs but have only run it for about 4 hrs. It cleans the system real well and makes the air stones work like new. I haven't changed air stones for about 2 years. I was alway clogging the disk and stone ones. I also find less nutes does better than more. I run the entire h&g line half strength. Hope this helps ya