Review on 🐠 Yagote CO2 Glass Aquarium Supply Essentials: CO2 Diffuser, Drop Checker, Bubble Counter & Check Valve for Lush Aquarium Planted Tank by Ivan Heyden

I have to say. I am VERY impressed with these drop checkers. I bought two as I used more CO2 than before in different tanks. So I didn't want to spend $20 on a multi tank drop checker. So at that price I went for it. They are big and the suction cup is very good. They are rightfully better than the more expensive and established brands. They're made of glass, so don't drop them. They won't break. However, I didn't feel like they were too fragile to handle. So save $10 and get better light by buying them. You can't be wrong.