pH low, cycling concerns regarding new live rock

zar

AC Members
Nov 22, 2004
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Okay, so I take the blame for this... :-)

I recently started cycling my tank, originally with the shrimp cocktail process, then with about 37 pounds of live rock (in a 29g tank) dropped in two days ago. I had been using up the last of a freshwater test kit I had for pH testing, and when it ran out (on the day I put in the first of the LR; two days ago), I got a new SW test kit and started using it. Unfortunately, I found out that the freshwater kit had been misreading the pH (or it was too old or whatever). In any case, the pH has been about 7.8 since I put the LR in. Ugh.

I got some Reef Pure Marine pH Buffer (WM Research) from the LFS and have been adding about a tsp per 12 hours, but I can't seem to get the pH up to a standard 8.3. It almost seems stuck at 7.8. I've added probably 3-4 tsps in the past two days. Sooo...

1) Is the LR being hurt by the pH being so low for the last two days? What impact is this having on my cycling process, assuming all other chemistries are about what I'd expect at this point?

2) How can I get the pH up quicker? Or should I worry about getting it up quicker? Is there something more suitable than this Reef Buffer stuff? Can I just increase the dosage or is that potentially harmful? The silly cannister for this stuff doesn't say how much to increase each 0.1 in pH, so I'm kind of guessing (but the LFS swears by this brand).

3) Any recommendations on a better way to raise pH levels?

thanks!
bruce
 
What are your ammonia and KH levels right now? Ammonia is an acid, and will lower pH, even with substantial KH present. Low KH, though, will result in a much more noticable decline in pH when ammonia levels are high.

The bacteria are likely okay--if the ammonia levels are steady or dropping, they are fine. Some of the other critters might be a bit stressed.

Don't try to raise the pH too quickly. Sudden changes in pH are very stressful for the critters in the tank. Since the tank is still cycling, the ammonia will continue to eat at the buffer, making it hard to make a stable change to the system at this point.
 
Be careful with that stuff...I did the same thing, and the pH ended way up at 8.6 (from 7.8). Back down to normal now though.
 
richardiv87 said:
Be careful with that stuff...I did the same thing, and the pH ended way up at 8.6 (from 7.8). Back down to normal now though.

Knock on wood, but I have just the opposite problem -- I keep adding it and it keeps NOT changing.

In some respects, I suppose that's a good thing, but... :-)

I tested last night and think it may be at 7.9 right now. I didn't have time to test it this morning.

Question: would you marine biologist types want to see the test reading data? I've been keeping it in an Oracle HTMLDB database, and I could make it available to view if anyone would be interested in seeing it.

(I know, cheap thrills... :-))

thanks,
bruce
 
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