Gazoo
Fish Addict
Has anyone used this (or other brand) sensor to detect/monitor ammomia? I have a friend who is thinking about fishkeeping and understands the importance of proper water conditions but I think some sort of visual aid would be helpful.
Is it accurate? How long do they "really" last?
Is it accurate? How long do they "really" last?
in one store and $8 in another store 15 min away 







