What is everyone's opinion on Seachem Prime? I just set up my 80 gallon and when I went to go get the plants, the guy at the store said he swears by Prime. I saw on the label that it detoxifies ammonia. I asked him if this was like AmmoLock and he said no. I just put in 10 cardinal tetras to cycle the tank and I want to make sure when I test for ammonia I'm not going to get a false zero. Also, is 10 cardinals enought to cycle an 80 gallon tank? Thanks!