Looks like it... They looks like air bubble...
Actually I dunno about others but with my PO4 at zero I still get cyano unless it is leaching out from somewhere and being used up as it leach back so my reading is still zero...
Thanks... Maybe it is my camera skill and my lousy handphone camera...
Haha...
Yeah, That why I went for 3x3x2... Like the depth...
Must thank Digiman for telling me to place all the similar corals togther if not I would have place them all over the scape.. LOL..
Yeah, But no choice using dead rocks, have to wait for coraline to grow which is happening now.. Maybe a few years from now, it will be purple... LOL... If you liked black sand den you would have used it for your tank liao..