Renovating my fish rooms, so breaking tanks down after years, and will clean everything while I have the chance- tubes, back of tanks, the works. I have several glass, and an acrylic tank. What does everyone like for cleaning long tubing (those brushes wont thread that far) old,used bio-ballls that are now bone dry, and for gravel that is covered in algae (too much winter sun) . All are fresh water tanks. Plain beach? and I have seen different opinions about Oxy/oxiclean. What is the current opinion, and is there a difference? Is is it gentler, or harher on tubing? Plan to use dilute muriatic acid to take of lime scale, live in the south, so it is heavy.. Any other suggestions?