Need help. Bought a container to mix saltwater in

[Miami Reef]

I bought this storage bin from target. It’s 45 gallons, but there’s no mention of where the 45 gallon mark is. How do I know how much water to fill to prevent too much or too little salinity?

 

[VietExtender]

You should be using a refractometer or hydrometer to measure the salinity though. [emoji848] so just fill it to where ever you want.

 

[Tokash23]

i would fill it with 5 gallon buckets the first time then use a sharpie and draw yourself a line.