Reducing salinity question

[compnut]

This might be stupid, but I have a 75 gallon that I'm going to reduce salinty to 1.009 for hypo. Question:
To do this gradually do I start with 5 gallons out, 5 gallons in of RO water?. I don't want to do it to fast and I'm not sure what percentages to do. Anybody have an idea on this.
Thanks

 

[compnut]

I have a hydrometer. Thanks for the reply.

 

[clarkiiboi]

I dont check into this forumn often......but is this 75 your main? If so, if LR, LS, corals, inverts, etc are in this don't hypo that tank!

 

[saltfisher]

I run my tank at 1.019 all the time. With a temp of 80.