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RE: ph buffering

chagoi 05 — Wed, 24 Oct 2007 18:14:04 GMT

[quote][b]Marc Loud (29/06/2007)[/b][hr]Depends on many things. Depends largely on the KH level of the mains water, and of the pond water. Pressure filters are also major culprits for creating acids, and stripping out KH. Oyster shells work well, but you need a lot of them. They won’t actually buffer the KH, but will dissolve when the water starts to turn acidic. They won’t dissolve enough to affect the KH enough to run the pH up anywhere near 8.4, and I wouldn’t want it to! Sodium Bicarb is a better way to pick up the pH, and KH level. I see no reason to run a KH any higher than 3dH (50ppm ish), as this will generally result in the pH running on the 7.5+ side, which has adverse effects on colour condition. My ideal pH would be 7.0 to 7.3

Courtesy Mike Snaden Yumekoi[/quote]

Hi mike my ph has dropped to 6.6 its usually about 7 ive got shells in

the nexus bio chamber they havent changed one bit in the last 18

month they have been in i was going to try Plaster of paris what do

you think cheers m8:)

Hi Marc ive replied to your post thinking it was mike getting to old for this caper.:hehe:

RE: ph buffering

slightyfasteracing — Wed, 03 Oct 2007 21:24:33 GMT

i had 4 ph crashes last december from 7 down to 4.5 in less than 2 days due i feel to acid rain when a local factory is belching smoke out and the wind blows my way.....so i added oyster shells that have been crushed for animal feed and since then my ph is always between 7.4 and 7.7 so happy days :D

RE: ph buffering

Anthony — Sat, 22 Sep 2007 23:33:13 GMT

Yes Bi carb worked for me too during the rainy season in July and August. By adding 2 tablespoons per 1000 gals I got mine upto 7.4 from 6.5 over a few weeks.

RE: ph buffering

Marc Loud — Thu, 05 Jul 2007 21:50:24 GMT

Glad to hear its Stabilising perhaps you could post some pics of your pond in the pond section to start that forum off.

Marc

RE: ph buffering

birdman36 — Thu, 05 Jul 2007 19:24:37 GMT

thanks both on your reply i got my ph up to 7.6 with with bicarb i use 1 teaspoon too every 220 gallons of water and it stablising out over the last fews days thank you very much cheers

keith

RE: ph buffering

Marc Loud — Fri, 29 Jun 2007 15:50:27 GMT

Depends on many things. Depends largely on the KH level of the mains water, and of the pond water. Pressure filters are also major culprits for creating acids, and stripping out KH. Oyster shells work well, but you need a lot of them. They won’t actually buffer the KH, but will dissolve when the water starts to turn acidic. They won’t dissolve enough to affect the KH enough to run the pH up anywhere near 8.4, and I wouldn’t want it to! Sodium Bicarb is a better way to pick up the pH, and KH level. I see no reason to run a KH any higher than 3dH (50ppm ish), as this will generally result in the pH running on the 7.5+ side, which has adverse effects on colour condition. My ideal pH would be 7.0 to 7.3

Courtesy Mike Snaden Yumekoi

RE: ph buffering

Ashley J Lee — Thu, 28 Jun 2007 08:25:20 GMT

As I understand it, when Oyster shell dissolves, it releases minerals. The minerals released increase the hardness of the water, but don't contribute to buffering capacity.

However, the carbonates that are released increase the Alkalinity and therefore stabilise the pH.

If you are going to use Oyster shell powder, be aware that it will make the water cloudy, initially.

You could bag up crushed Oyster shells and place them in the filter, not done it myself, but this should work.

Perhaps Marc, our resident expert, can add more help on this one.

ph buffering

birdman36 — Thu, 28 Jun 2007 00:17:27 GMT

i have a ph 6.5 on my tap water my pond is only 7.0 can i use crushed oyster shell to help buffer my ph reading on my pond as i have heard oyster shell as a buffering ph of up to 8.4