Sand removal?

[RPatsula]

I have a 230 gallon display tank and a 100 gallons sump. What I was going to do was just siphon the water and sand into 5 gallon pails. Then I was going to replace the water with new water for my scheduled water change. So hopefully when removing the sand and water I do not remove more than 40 gallons of water. The siphon hose I was going to use is a three-quarter inch soft plastic hose.
I was just going to rinse the new sand in my RO/DI water. I like the idea of using a large diameter PVC pipe to put the new sent back into the tank.