I was worried about dipping the tube in the tank so I went to Walgreens to get a syringe. They have a bunch of different sizes, you have to go to the pharmacy counter and ask for them but they are free. The API test kits all use 5 ml of water and they have that size there.

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It is perfect, pull plunger out and you have the exact amount of water you need. They gave me 3 when I asked, so one is for water for test kits only, one for measuring Excel dosage, and one I'm using for my acid drops.

This is how i carry out all my testing Guarantees i get just the correct amount of water (via the syring) in each test tube. Must say if you dont use this method ya want to give it a try, and then you will see how much easier it is

I use one as well, only way to go

I'm gonin' to have to try this! I've been looking for a better way to get the water in the tubes.