[seatrueblue]

I'll have to make due with the API test kit..easy to read but I see what you all mean when there is nothing between 0.25 and 0.5. I can't see me ordering priority shipping for just a copper tester and there is no other test kits I need. The API says the copper level is 0.25..well its not over but not where it should be. I don't know why its not where it should be we measured it right. We measured it for the water volume even though they said its a 29 gallon it really only holds 27 gallons. That is with out anything in it. With stuff in it (rocks and sand) the tank holds 25 gallons. You can sqeeze 29 gallons in the tank but its almost to the point of over flowing.