how to figure out net volume?

[Aquattro]

Originally Posted by crimper

Buoyant Force Formula
Fb=gρV=ρghA
Where ρ is the density of the fluid (saltwater=1029 kg/m3)
g is the gravity,
V is volume of the immersed part of the body in the fluid.
h is the height of immersed part and
A is the area.

Solve for Fb (Buoyant Force) first
Fb=ρghA

Then Solve for V (Volume of the immersed objects e.g. sand+rocks)

V1=[Fb/ρg]

Vt=V1+V2
Where Vt= Total Volume = 300 Gallons = 1135.62 Liters
V1=Total Volume of Objects (Sand+Rocks)
V2= Total Volume of Water

V2=Vt-V1

Good Luck

Great if you're floating a barge and want to figure out the volume it displaces. Let us know how the figuring volume of rock works out

To simplify, I'll guess the rock takes 50g of space. There ya go!

[sphelps]

Just take your total volume and multiply by 80% (0.8) to account for rock. That's close enough for Zeo, it's even in the guide.

Originally Posted by Zeo Guide

In order to calculate the required amount of material, take the gross water volume of the total system and subtract approximately 20% for an average decorated tank to come up with the net water volume. Use this net water volume to determine the required amount of ZEOvit®.