U tube

[karenj]

Is there such a thing as a "bad" u tube. I started the first one just fine but cannot get the second one going. Any suggestions? Thanks, Karen

[bubbaOPPD]

Try holding it out of the water up-side down over your tank and fill it with water to see if you have a leak in the tube.

[karenj]

Well I don't know what I was doing wrong all the other times but I finally got it going. Now could somebody tell me why my coral gravel is turning brown?

[nebraskareef]

algae.

If this is a new tank, this is normal. keep up the water quality, and it will eventually phase itself out.