Questions from a Newbie

[Ian]

I have a biocube 29 that has just completed cycling and I have introduced LR, 2 clowns and a yelowtail damsel and a yellow watchman gobie into the tank over the last few weeks. All seems to be going well water is testing fine daily.
I have 2 questions ( at this time)
The water being retuned to the tank is full of tiny air bubbles. I don't think this is anything but an asthetic issue but how do I get rid of them?

I also have a bright red Algae (?) growing on one chunk of LR an on a couple spots on the substrate. Is this a big issue and how do I go about getting rid of it or at least controlling it. I have a few snails of various varieties and some hermit crabs for my CUC but that is all at this point.

Also why didn't anybody tell me this was more addictive than crack I have kept freshwater tanks for 15 years and I am totally hooked on SW. already planning a 110 gallon setup to start in the fall.......