12mls isnt much and 40mls isnt much either , so yes youll need to add much more alk to get where you want it:)


some people have to does in the hundreds of mls ( a friend doses 1g of alk and cal a week in a 120g sps packed tank)

it would take well over 200mls of bicarbonate solution just to birng your tank to 9dkh, this doesnt take in account how much your tank uses.


if c balance is a bicarbonate solution then its not as strong as a sodium carbonate solution would be , im not sure what their product would be but it would be either or if its in salt form.

i dose 40mls of bicarbonate solution in a 40g system that has mostly lps and zoanthids;)

I added the 3 tsps of reef builder and now my dkh has gone from 6.7 to 8.5. I didn't think it was good to raise the alkalinity that quickley. Now my question is how do I keep it there? I was using the reef calculator but I guess it wasn't really giving me the right amount because it said to dose 108 mls to get alk to 8.6. Should I continue dosing and add the reef builder as extra?

actually the calculator is spot on , 3.3 tbs of dry sodium bicarbonate crystals will raise your from 6.5 to 8.5

generally theres no need to raise your alk that fast but its not necessarily going to cause harm , as i mentioned its a rule of thumb but you can def do more if you needed to:)

it comes down to what are you entering as your solution or additive if your using the brs calcutor?

from what i can read c balance is a bicarbonate solution if it helps:)

this calculator has two little fishies as a product to pick

http://reef.diesyst.com/flashcalc/flashcalc.html

I am not usually using reef builder to dose with. I usually use C-balance. If I dose c-balance and use the 108 mls then if I am dosing 40 mls in 2 and a half days shouldn't I reach 8.6? Or am I totally reading this wrong?

Your not raking into account your daily consumption which us prob around 1 dkh, so in two days what you added has been used up;) making it seem like it not raising

So first thing tomorrow add 1 spoon and see what it does:)

this is where a log book comes into play , jot down the alk daily then at the end of a week or two you'll have a solid under standing of what your tank needs daily.

Thanks for all your time and advice. I am hoping to get back on track now.

Sounds like you have it figured out now. The idea is to test, dose a measured amount, wait an hour, test again. Do that with the C-Balance so you know how much it affects your tank. I haven't used C-Balance in a long time, so I can't remember how much it should affect your tank.