Lets be honest for a second. Weve all been there. You stand in tummy of your glass box, staring at a bottle of costly liquid fertilizer or a tiny vial of ich medication. The label says "5ml per 10 gallons." You see at your tank. Is it truly 10 gallons? You bought it as a "10-gallon starter kit," correspondingly it must be 10 gallons, right? Wrong. This is the moment where most hobbyists create a mistake that leads to a cloudy tank or, worse, purposeless fish. You absolutely dependence a Quick Aquarium skill Calculator For exact Dosing because your eyes are lying to you.
I speculative this the hard quirk back up in 2018. I had a beautiful 29-gallon planted tank. I was dosing Glutaraldehyde to slay off some unbending BBA (Black Beard Algae). I calculated based on 29 gallons. I forgot that I had three inches of heavy aquarium gallon calculator substrate and practically twenty pounds of seriyu stone. Within twenty minutes, my Cardinal Tetras were gasping at the surface. I had overdosed them by approximately 25%. Why? Because my actual water volume was barely 22 gallons. Thats a omnipotent gap.
Why Your Tank Size Is Probably A LieWhen a manufacturer sells a tank, they provide you the external dimensions. They don't care virtually the glass thickness.