Carib 13 Report post Posted April 16, 2016 Hey guys, was looking to add some rocks to my discus tank and had look around local landscape yard and came across blue metal rock ( same stuff as road base ) . Did a muriatic acid test on it and negative for carbonates so I'm pretty sure it won't raise the pH. Has anyone used it before and found any issues? Sent from my iPad using Tapatalk HD Share this post Link to post Share on other sites
Lictoga 361 Report post Posted April 16, 2016 It gets really slippery with a bit of algae. Share this post Link to post Share on other sites
