Buoyancy salt vs fresh calculation

[NAM001]

My camera set up is negatively buoyant. I have ultralight arms but jumbo floats attached aren’t enough, so I plan to get the floaty arms.

I need to weigh my set up in water to find its water weight, however I’ll be weighing in fresh when I normally dive in salt.

Is there a calculation to find out what the weight would be in salt?

1# FOR 40# LIGHTER IN SALT ...... that is out of water total scale weight

 

[Interceptor121]

You are overcomplicating your life. Salt water adds in most cases less than 200 grams buoyancy. Just make the rig neutral in fresh water and use floats you can remove like stix. Get to neutral and be prepared to drop a few

The is no point literally boiling the ocean for 50 grams and in case the rig is too positive you can add weights on it to make it sink