The title says it all. How low can you go? I currently have a bicolor angel in quarantine who has a mild case of ich. This has been going on over a month in a 40 gallon quarantine at a specific gravity of 1.008. As of tonight I dropped the specific gravity to 1.006. Is it safe to go lower than that if a month at 1.006 doesn't clear it up? I'm hesitant to use cupramine because even slowly ramping the dosage up, I've had pretty poor results when it comes to dwarf angels and cupramine.