Seriously.. It is diatoms.. Its not red slime. It is something that happens with every new tank and they all have to go through it. You can start adding Clean Up Crew that will attack that problem. Things like Cerith Snails, Nassarius snails etc. There is a sticky at the top of the forum that covers clean up crews and what they are good for..
You can try cutting your photo period a little, you can try increasing your flow.. With the one power head I saw, and if you have a 14 gallon tank like I'm figuring you do then you only have 5x turnover.. For a FOWLR tank you should have somewhere in the neighborhood of 10x to 15x the number of gallons in your tank in gph water flow through your powerheads etc.
Do a little reading on diatoms algae it will help you understand the process.
hth..
Mark