[ATI sunpower dimmable 6 or 8 bulb]

I have the ati 8 blub dimmable on a 75 and havent had any problems with it

 

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[Purple hair algae]

No it doesn't slup up i just look up the red turf algae and that sounds like what i got

[Purple hair algae]

I have a lot of this purple red algae growing on my rocks and starting to grow on my glass. Is it harmful to my tank and how do i get rid of it or control it i tried posting a pic but i cant get it to show up

 

[New to the saltwater world]

How offen should I be doing water changes im being told every week but i thought i read somewhere that i should only do it onec a month and how much water should i be changing

[New to the saltwater world]

Im getting a 75 gal set up off a friend of mine that is moving up to a 210 so he is giving me all the live rock, live sand, pumps and light that were with the tank. Im thinking taking 50% of the water that in the tank to. Any recommendations or advice on the moving and setting back up the tank at my house would be awesome and he just moved his fish and coral out of the tank yesterday.

I have had a few freshwater tank and i currently have a 55gal freshwater tank