pond version is the same just a bit more consentrated i buy only pond stuff,.
last longer and save more money,.. but harder to dose tiny tanks,..
difference between pima and mela is one treats fungus, one is bacteria,..
drawcak is you have to airate tanks with this as it affects the oxygen level,.. start first dose half strangth just to see if your fish is bothered by it and then add a bit more next day higher till the full strengh is met,..
some cories are affected at full strength,...
work great if caught fast,.. if a longer illness then re treat till looks better follow directions,..