Thanx Brad.

I think I'll still use Reef Builder just to avoid the pH issue that comes with baking soda, but that's still good to know about the soda now, once and for all.

Thanx for the info.

Cheers,

Mark, I think you'll find the same pH issue from reef builder. Essentially it's higher grade baking soda. Same chemical reaction ionce it hits your tank. And FWIW, the ph "issue" isn't really an issue.

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I hate these reef chemistry threads, they always make me second guess myself. :mad: Now I'm going to go home a test everything because I'm paranoid!! :confused:

Danny,

Testing is good :biggrin: Keeping records of tests and what and how much you add is good :biggrin: This tells you what your tank has utilized since your last test, and this too is good :biggrin:

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I know, its just that too much tweeking and adjusting can land you in a whole lot of trouble. I learned this the hard way in the spring.

Question: Since setting up the new tank my PH has been slowly but steadily dropping. From 8.19 to 8.07 over the past month is not much to worry about.....yet. I've done three water changes totaling about 50% since May 1st. Is this normal?

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Sure, but it's more likely variations in your meter. Anything between 7.8 and 8.4 is acceptable, and minor fluctuations are perfectly fine. Don't worry so much :biggrin:

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I've always wondered where the best location is for the probe. Low or high flow.....

doesn't much matter, but if you're using a full time probe, it will certainly fluctuate with time.

So what is the low down on those Pin Point probes, I've got the pH meter and need a new probe, should I just forget it then and buy a reagent test kit? Are the probes/meters accurate?

Doug