PH Profiling - how do I do it?

[Andy Thurston]

Some people use cheap single stage regs and never have a problem with eotd. Eotd can happen with any single stage reg so for complete peace of mind the use of dual stage regs will prevent this happening. Just because someone says it doesn't happen doesn't mean it wont

 

[pepedopolous]

As far as I'm concerned EOTD = regulator not fit for purpose.

P

 

[Andy Thurston]

As far as I'm concerned EOTD = regulator not fit for purpose.

P

Me too

 

[Christos Ioannou]

I can not be 100% sure that someone else's tank is gassing off all of it's CO2 an hour or two after CO2 and lights are out. Mine does and in the morning, before the CO2 comes on I can use it to check for pH. Your water sample would suggest that your tank does not (work on that) meaning, you should use a water sample until you do. If not you may have more CO2 then you thought. This may also explain what happened to Paulo.

Hi Tug,
In water left to stnd for 2 days, taken from the tank, I get pH 7.8

In water from same tank, just before co2 is on, I get pH 7

1. Should I ve aiming for pH = 6.8 OR 6 at lights on time?
2. Should I aim in better gas exchange when co2 is off to get my pH in tank same as that of the water left to stand?

Thanks.