Did some maths and I found I would save about $1 per water change if I use Red Sea salt and a RO unit but it would cost a extra $25 if I was to buy the RO water and if I buy the RO unit and a TDS meter and do a fortnightly 105L water change it would take me 11.5 years to pay off the RO unit and TDS meter. Essentially with a lot of people saying Red Sea salt is better than natural sea water ill go with it and a RO unit and since mixed salt water can't Carry parasites etc ill quarantine my fish etc so at the end of the day my tank will have no disease in the system not just everything being healthy
Plus this was cheaper without factoring in top off water but the cost of ro unit matinance will probably mean they come out at the same price
Plus this was cheaper without factoring in top off water but the cost of ro unit matinance will probably mean they come out at the same price