<a href=showthread.php?s=&postid=15470397#post15470397 target=_blank>Originally posted</a> by Shane Hoffman
Thats odd...depending on the age of your tank as long as calcium, alk, and magnesium levels are where they should be your power heads should be one of the first things to grow coraline on them.....atleast that is what has happened IME>..