I've read the FAQ-Need Help (part 6)

I figured out what the Skimmer is... It's a Sea Clone 150. =\ I think I
remember reading that they suck.?.

Supposedly, all you need to run it is a power head. I'm still looking in to
that but being that I wont need it until after the tank has cycled, I'm
kinda puttin that on the back burner. Do you think that will be sufficient
for a FO tank?

I decided to get a RO/DI unit. I found someone locally who claims these are
very high quality. As soon as I get some specs I will share them but in the
mean time, If I am using an RO/DI unit, I do NOT need any conditioners
right?

One more thing and this may seem really stupid but... In regards to weight.
Everyone knows that sal****er is more dense than fresh water. Regular water
weighs approx 8.33 lbs per gallon.

Am I correct in assuming that the specific gravity from the hygrometer can
be used as a multiplyer to calculate weight per gallon? For example if my
reading is 1.020, can I multiply that by the weight of water to figure out
how much the salt water will weigh? 8.33 X 1.020 = 8.50 so it would only
weigh 8-1/2 pounds instead of 8-1/3?

TIA

~Mort