Instant Ocean

[burrows14]

right now i use h20cean for my biocube 29 reef tank which is pretty pricey as far as salt goes . im thinking of upgrading to a 120 gallon fowlr very soon. So my question is Do i need to be spending 89 bucks for a bucket of salt or can i get away with the 40 dollar bucket in a FOWLR because ill be producing 5 times more SW a month.

thanks
ray