Vayinato Aquarium Co2 and pH Indicator Solution Liquid with Indicator Glass, 30ml - Co2 Drop Checker for Aquarium Fish Tank

Good value for money

Good product good glass but solution is green color not showing blue color

solution is just a simple ph indicator not a 4DKH solution. Just buy the solution from a different brand.

This is my second tester, I had difficult with my first kit and this is my second for the same aquarium.Yes, it changes color but it doesn’t make you feel confident enough to make a decision on the Co2 stability.The color is too light and if you have an ultra clear glass with a heavy thickness, it’s really difficult to judge the color ratios.I would rather go for ph tester instead.

It doesn't change any colour no matter how much CO2 you provide, It stays at green. I tested it for 5 days and then writing this review. Totally defective product. It would be better to buy some branded product rather than this copy.

Glass apparatus missing