Using this manganese along with doing a 3/4 gallon water change every other day. while also dosing Reef elixer. Is 5 drops a week safe on my 60 gallon LPs heavy tank? I have 5 Goni about the size of a frag plug and only two stay open. The others hardly extend out. I purchased the Hanna tester without doing research and not knowing that it’s not reliable for this application.
