RO testing foco?

MattL

Tang
M.A.S.C Club Member
#1
I have a strange black out break in my sand. I need t test my ro to see if that's it. Let me know if you know who does it. Thanks.
 

dv3

Beluga
M.A.S.C Club Member
#5
black sand is not good ...i would guess its not your RO and that things are dying and/or its some type of bacteria?

how deep is your sand bed?
 
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