brown algea

I have a reasonably new 10 gallons low flow tank, just a return pump no wavemaker This project was intended to be a low maintenance tank, so I haven't been doing regular water changes -- I understand this may be a mistake with the amount of corals/livestock I have in there, but it's hard to...

Here’sa few pics of my aquarium, I’ve acquired some bunch of brown algae on the floor and some around the tank etc. please tell me how to fix this? I’m trying to get water correct before I put ANY LIVESTOCK in there!

Hi I took some samples of the brown algae starting to cover my rocks and sand. I found 2 different shapes which both are moving. Can anyone identify these?