Ph buffer??

Hi guys I'm just after a bit of help if somebody can spare a bit of time? In useless at working things out and am struggling to work out how much ph buffer i need to add to my 200 litre tank.

My current ph is 7.55 and I'm right in wanting it to be at 8.3 as in looking into keeping sps.

I bought a ph buffer made by seachem to do this. The instructions say to add 5g (1 level teaspoon) for every 150 litres to raise the ph by 0.1ph units.

I know it's a lot of numbers but I'm goin around in circles trying to work it out and would really appreciate some help please? Thanks again

 

Your 200L tank is 1.33 larger than the 150L dose rate in the instructions so to raise your ph 0.1 you will need 6.66g instead of 5g. You are going from 7.55 to 8.3 so you are raising it 7.5 times. So 6.66g times 7.5 = 50g. I would dose it 10g per day for 5 days.

What are your alkalinity, calcium, and magnesium levels? Usually if you keep these 3 in proper range, the pH is stable.

 

Great, thanks very much!

I'm not sure on the other three... I should get a test kit before adding the buffer then? Thanks again for gettin back to me so quickly!

 

I would go ahead and add the buffer. Your alk is likely low causing the pH to be low.

 

Great, thanks very much

 

Time of day and some other factors influence the Ph reading and in and of its self Ph is useless get the Carbonate or Dkh level to their proper levels and the Ph has to be good . Early in the AM. before lights come on CO'2 build up over night will suppress Ph. As will Lowered Oxygen in the water or a cover that is fit to tight and will not allow the CO'2 to be driven from the water.

If you are using a liquid color test kit then its at best maybe close with the reading of the Ph value I never trusted them.. But if you keep the DKH correct then you no there are enough ions to off set the acid problems in the water . You can take a glass of tank water outside or put an air stone in the glass and the PH will jump up thats all Ph is a indicator of carbonates not the true carbonate levels available to buffer the water ..

 

Ah right ok. It's a seneye monitor giving me the ph readings constantly throughout the day and the reading stays constantly low?