Originally Posted by N.Galvin
Thanks i have a question actualy i dont have a r/o system yet so how do i top up evaporation in the meantime as i am told not to use tap water due to the chemicals
Unfortunately, you have to top up with the purest water possible.
Just go at the grocery and find "Distillated water" Or "Reverse osmosis water" bottles, make sure they don't have been remineralized after the filtration process.
Else you can start your tank with the good way, purchase a 3-4 step RODI
unit, fill all the tank with clean water, that's a good start point. Else you'll start with a tankfull of tap contaminated water...
For freshwater, we don't care about using unfiltered tap water in most of the time, but in a reef this can make an huge difference. Imagine if your tap contains >10ppm nitrates... Your reef lighting system will cook some brand new algae everywhere...