Ph at 7.36

[brownsalt92]

I just set up my brs dosers and I made programs to dose is this right? I want it to does 35 ml of alk and 35 ml of cal from 22.00 to 10.00. The dosers are plugged into ports 7 and 8 on apex 2016

I used to dose 20 ml of each 2 part
On top of kalk in my ato I got rid of my kalk and have just Rodi and have dosers up and tested manually am I doing something wrong

 

[brownsalt92]

Tank is a 90 display lot of sps frags and mini colonys,

 

[skim]

I would double check your PH reading with a manual test kit. It maybe time to re calibrate your probe. If by chance your readings are correct I am surprised your Corals still have flesh. You would have to do some large water changes. What is your Alk. at? The other thing that can cause low PH would CO2.

 

[brownsalt92]

I manually tested alk it's at a 8.0 and ph is around a 7.8-8.0 my apex has been on the tank for 48 hours and already needs to be re calibrated? That's odd or is it normal??

 

[skim]

7.36 to 7.8-8.0 believe it or not is a big difference, you really do not want to go below 7.8. Looks like things are coming around I would try and get the ph up a little like 8.2-8.3 and a Alk of 8-10 and those SPS should start exploding.

 

[Lasse]

I would recalibrate the probe and see if there was a different value. If your manual pH test shows right - 7.8 - 8.0 is quite normal - especially in the morning before the lights are on.

7.36 is far to low. I suspect that you have experience of freshwater because you ask if you do something wrong with the dosage of alkalinity. Dosage of baking soda has not the drammatic effect on the pH of seawater compared to freshwater. At the 8.1 - 8.2 pH addition of bicarbonate becomes more and more ineffective in order to rise the pH (is the same in freshwater - but you are seldom up there (I know about lake Tanganyika, Lake Malawi and some lakes of Central America )

Your alk addition looks right but you need to measure it rather frequently in the beginning – just in order to get the alk right and stable

If the probe only has worked for a coupple of days - its not uncommon to be forced to recalibrate it rather soon.

Sincerely Lasse

 

[tomtom2245]

You mentioned the Apex has only been in use for 48hrs, did you properly calibrate the pH probe before putting it into use?

 

[Rick Mathew]

I agree...before you make any moves confirm the probe is correct...If it it is wrong your actions will be wrong...They do go bad...even when new!...I calibrate mine every month and have a second probe in the tank (SENEYE) to verify...Important to get the correct reading to know what to do...I always tell my students "The officer does not care that your speedometer is not accurate...You get the ticket!"

 

[Elementalj]

Every probe I've ever used needed at least a week of submersion to function correctly. Even the little red Hanna probe was finicky in the beginning. Now I trust it more than anything.

 

[Rick Mathew]

Every probe I've ever used needed at least a week of submersion to function correctly. Even the little red Hanna probe was finicky in the beginning. Now I trust it more than anything.

"Trust but verify" Ronald Reagan

 

[brownsalt92]

Thanks my apex said my salinity was low 31.5 gave it a day after conferring with a refractometer.and the probe is reading dead on now! I test daily no matter what with a investment like this! You can never be to sire