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Originally Posted by jvharding  I am trying to figure total tank weight. Figuring for water displacement and the rock weight |
Should not be that difficult.
If you know the tank weight and you know the rock weight that you are putting in.
Then just keep track of the water as you put it in and find the weight of gallon of salt water and multiple that by the gallonage used then add all 3 together.
This would be much simplier then figuring out displacment and all of that.