I started treating with coppersafe last night for ick. I have a 55g qt that isn't quit topped off so I added 13 teaspoons of coppersafe. The instructions say 1teaspoon per 4 gallons of water. I tested the wter for my copper levels afterwards. Mt test is a little hard to read. The kit jumps from 20 to 30 and I know that the # needs to be about 25. The test has the tube that you add 10 drops of the solution into the tube of tank water. Do I read the test from looking from the side of the tube or from the top looking into the tube. I know that this has to be done correctly to work and not harm my fish. What are some signs that the fish are stressed?