What is needed?

Im fairly new to the hobby and had a few questions for all the experts out there. Im currently building a 75 gallon (48x18x21) and wanted to know about some equipment and suppliea that would make my life easier, do i need a digital refractor of a plastic one? what is a good test kit for a 75 gallon? what is a good but cheeper but good salt to use? what would be a good sand to use? How many lbs or base or live rock?

What I have: tankand stand, RODI unit, protien skimmer, 55 gallon to be used as my sump, heater for a 80 to 110 gallon.

I have a running standered 20 gallon with approx 25-30 lbs of live rock, crushed coral sand bed heater, T5 light (will be used under the 75 as a refugium light), and same basic chemicals.

any proven and or cheeper segustions are apreciated.

 

I was also wanting to try an alge scrubber and wanted to know if anyone has had any experiance with them or is it all just a myth?

 

What powerheads are you going to use?
If you give the ATS time to grow out, they are great. People have just gotton away from them since chaeto has become so popular.

 

I dont know yet havent decided which ones work the best. I do know I dont want a wave matchine so what ones and how many would be good for a 75?

Also what are good return pumps for the the sump?