How many inches does a display tank water usually drop? Im using one of my loc line hoses (as a xtra precaution) as a break siphon along with the hole in the mega flow kits elbow. So if my water level drops an inch in the 90 gallon then i lose 3.75 gallons of water to the sump. My 20 gallon sump is 30x12x12 and ill have a 7 inch water level with room for 6.2 gallons of water. I think my train of thought is correct no? |