Originally Posted by
JAXFishGirl
http:///forum/post/3198228
I dont know how much water to buy...I don't want to fill the tank and then have it overflow on me as I am putting the rocks in.
hopefully someone at the LFS will have somewhat of an idea. Now...how to transfer all this water to my house.
The first chance you get I would buy a RODI unit. I know more $$$$$ but you gave up on liking money when you got into this hobby. Ill tell you what will happen. Your gonna need some water at a time when you cant get any and your gonna pull your hair out worried. I love my RODI. If I didnt have it I would have been in even a bigger mess today when my sump cracked! SHEESH!!
As far as the displacement for the rocks. Its gonna be hard for them to give you a good idea as the rocks very in size. You see it really depends on the size of the rock and not the weight. Imagine a base ball made out of rock and one made out of hollow plastic. They both would displace the same amount of water even though the rock would be heavier. If you dont fill your sump and put your rock in the tank first then fill it you can probably manage ok. I would suggest you buy more than you need and keep what you dont use for top off water. That sucker will burn about a 1 gallon a day or so and you do the math. Thats why your gonna want a RODI very soon.
Keep us posted.