- Reaction score
- 3 years
My Top FIn water condition is finally almost gone so I plan on purchasing Prime next. I have a 20 gallon high tank and do a 5 gallon (25%) water change weekly. For dosing it says to use one ml for each 40 liters (10 gallons) which is 1 thread on the cap. Since I only do 5 gallon changes I would only need to use 0.5 ml or 1/2 of one thread. Is there an easier way to measure that out so I can add it to the water before I put the new water into the tank? Or should I just add the prime directly to the tank and dose it for the full 20 gallons (2 threads on the cap). I am not sure which method is more beneficial. If adding it to the new water is better then what would be an easier way to measure out 0.5 ml?