as long as you use the storage solution then you are fine you don't need that much the idea is just to keep the tip moist. But when you run out of storage you can use Ph calc 4.0
Zandor Reviewed by Zandor on . picked up a new hanna unit ok well i had to get anotehr ph meter mine went on me so anyhow.... i got the 3 in 1 unit they offer, i got it today and im having a bitch of a time getting it calibrated....shit im even havinng a hard time to get it to turn on, it seems that you really have to push the buttons on it hard to get it to respond im guessing cause its new and needs to break-in how are you guys calibratign yours? what solution you using....please elaborate!!!!! thank you Rating: 5