Ph swing ranges

[L/B Block]

What I gathered from my research is that as long as you keep PH in a good range and it doesn't swing huge - forget about it

Read the same...


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[Ibn]

Forgot to address the other part of your question. Most mature tank pH will drift daily with no signs of algal growth and more than respectable growth. Sanjay Joshi is a good example of that with one of the fastest growing SPS tank and his pH ranges from 7.9 - 8.4 daily. pH is one of the least important factor when it comes to reefing.

Even on the reefs, the pH swings from 8 - 8.3 daily.

 

[L/B Block]

Forgot to address the other part of your question. Most mature tank pH will drift daily with no signs of algal growth and more than respectable growth. Sanjay Joshi is a good example of that with one of the fastest growing SPS tank and his pH ranges from 7.9 - 8.4 daily. pH is one of the least important factor when it comes to reefing.

Even on the reefs, the pH swings from 8 - 8.3 daily.

Good to know-thanks!


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[rygh]

Mine is 7.7 to 7.9
Yes, a bit low.

 

[daddio]

Mine is 7.7 to 7.9
Yes, a bit low.

How are you so low? I thought you were adding alk/ca with your vinegar?

 

[capescuba]

Mine is hovering right on 8 with vinegar/kalk+2. It was running a little higher at ~ 8.1-8.2 before adding

 

[Tmjvb]

8.3 - 8.4

 

[rygh]

How are you so low? I thought you were adding alk/ca with your vinegar?

Winter means my house is a bit too sealed up. So excess CO2.
The vinegar dosing drives the PH down.
I dose Baking soda, not soda ash or baked-baking soda, which also drives the PH down.

I did run a CO2 scrubber for a while. Pushed the PH up nicely. But media is expensive.

If it was a priority I would probably switch to Kalk. May someday...

 

[daddio]

Mine is hovering right on 8 with vinegar/kalk+2. It was running a little higher at ~ 8.1-8.2 before adding

How much are you dosing?

 

[capescuba]

I started with your formula 45ml vinegar + 3/4 tsp Kalk+2 + 1g RO and will tweak from here.

Will test Alk and CA when I get home this evening

 

[ashburn2k]

Mine is 7.7 to 7.9
Yes, a bit low.

mine is 7.4-7.7 everything just growing slow for SPS.

 

[daddio]

I started with your formula 45ml vinegar + 3/4 tsp Kalk+2 + 1g RO and will tweak from here.

Will test Alk and CA when I get home this evening

Cool! You're putting the vinegar into a beaker and then adding the Kalk, Then stirring well and adding that to the ro?

 

[itsacrispy]

My pH swings between 7.59 and 8.1 throughout the day. What's odd is that my Calcium is very high, over 500ppm, but my pH didn't show it.

 

[capescuba]

Cool! You're putting the vinegar into a beaker and then adding the Kalk, Then stirring well and adding that to the ro?

Yes Sir! Actually more "swilling" than "stirring" but there was practically no residue when I added to the RO

 

[Ranjib Dey]

My pH swings between 7.59 and 8.1 throughout the day. What's odd is that my Calcium is very high, over 500ppm, but my pH didn't show it.

Whats you Alk level ?

 

[capescuba]

My pH swings between 7.59 and 8.1 throughout the day. What's odd is that my Calcium is very high, over 500ppm, but my pH didn't show it.

I thought CA came out of saturation at around 450 PPM? I'm no Chemistry major though ...

 

[JVU]

Alkalinity (carbonate) is a pH buffer so higher alk reduces the daily pH swing and overall buffers it to a higher level. Other than Ca precipitating with alk and thus reducing the buffer, I don’t know how it otherwise affects pH.


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[itsacrispy]

I thought CA came out of saturation at around 450 PPM? I'm no Chemistry major though ...

It certainly does, because I just experienced it in my tank . Tank was opaque for a couple days until someone suggested I stop with my daily water changes. I did that and overnight the cloudiness disappeared.