Hey!
We have a 10gal with danios and dwarf gourami and a 25-30gal(dunno the exact capacity, old pet store tank, 36x12x12) with nothing but guppies in it.
Both tanks have been setup for about a year with very stable water parameters. But over the past week, nearly every single shrimp in both tanks have died, we went from hundreds to single digits in less than a week. No new fish have been added and nothing has really changed. The only thing that has changed is I started dosing Easy Iron. Prior to that it was only Easy Green and potassium with the occasional Prime once every few months when they require a water change. We feed spirulina wafers, Xtreme krill and live baby brine to both tanks. Both tanks have exactly the same parameters.
Ph: 8-8.4, GH/KH: maxed on the test strip)(Wyoming has liquid rock), ammonia: 0, nitrites: 0, nitrates: 20-40 at all time.
Is it possible I dosed too much Easy Iron? I know it's shrimp safe and I only dosed exactly what the bottle said and I only dose once a week. That's literally the only thing that has changed is the introduction of the iron. Kinda grasping at straws here.
Thanks for looking! ✌️