Calculating the total number of drops needed is a bit tricky. Most tanks are not full sized. A 10 gallon may only actually be 9. So it's good to know the actual size in gallons to help you with the correct dosage.Is 10 drops of cupramine day for 4 days good to raise the copper?
That being said, with Cupramine, they on the bottle suggest you use two big doses to get to therapeutic. It can be pretty hard on some fish. I prefer to calculate the total number need to reach therapeutic and do smaller doses. For example: a small dose in the AM, lunch, PM, etc. until you reach therapeutic. This gives you the opportunity to observe and see the reaction of your fish to the copper. For Velvet you need to get to therapeutic within 24 hours because they reproduce so rapidly; for Ich 3-4 days is usually fine unless it's a really bad infestation.
