Water question

[dtvmike]

I've been using tap water in my 120g system. I just purchased a RO/DI unit, how long will it take for my system to be completely ro/di water with 10% water change every week? No sump so just 120g

 

[reefman]

120(12)/.1*.1(X)=120~0.1/120 figure out what X is will determine how many WC is needed. :lol::kidding:
I aint no mathamethical genius but i dont think u will competely replace all 120g with ro/di water since each wc will only dilute 10% less tank water with ro/di water. as long as u keep improving the water condition of your tank with each water change, your tank should continue to do better.

 

[masterswimmer]

Exactly what reefman said (not necessarily the math part ). Even if you change 100,000 gallons of water you'll never be at 100% RO/DI. You will continuously dilute it and it will keep getting better for your system though.

swimmer

 

[bigbris1]

1 day w/100% wc

 

[HAVIC]

Here is a water change calculator
based on your system it will take slightly more than 16 weeks at 12gallons per week water changed

 

[masterswimmer]

1 day w/100% wc

That's the only way

 

[PalmTree]

Drain it and fill it! Nice calculator!