Your water parameters are fine and there is no reason to purchase an ro unit.
We probably need a little more info to shed light on the recent death.
How long have you had the rcs?
Have they been molting normally?
Are there fish in the tank?
Are you running co2?
Have you recently dosed any products that contain copper?
How do the rcs behave?
What have you been feeding them?
We probably need a little more info to shed light on the recent death.
How long have you had the rcs?
Have they been molting normally?
Are there fish in the tank?
Are you running co2?
Have you recently dosed any products that contain copper?
How do the rcs behave?
What have you been feeding them?
