some pH question??

[nguyen4]

hello everybody, my name Nguyen ( new with koi hobby) i has a pond with 1500 gallonand 10 fish 5 over 16" and 5 under 12" my question is why my pH kept go down after 2 or 3 days i did change a water 10/100 or 20/100. it stay 7.2 and go down to 6.6 , 6.4 onetime it down to 5.8 i did add pH up in but it still go down after 4 day salt .05 nh3 is ok anybody have any ildea??? thank you

[Russell Peters]

Quote: Originally Posted by nguyen4 hello everybody, my name Nguyen ( new with koi hobby) i has a pond with 1500 gallonand 10 fish 5 over 16" and 5 under 12" my question is why my pH kept go down after 2 or 3 days i did change a water 10/100 or 20/100. it stay 7.2 and go down to 6.6 , 6.4 onetime it down to 5.8 i did add pH up in but it still go down after 4 day salt .05 nh3 is ok anybody have any ildea??? thank you

Do you have a liner pond? pH up is not a permanent buffer so you need to get something that will work more effectively. Calcium carbonate in some form is best.

[PapaBear]

I'm with Russell. You have plenty of Koi in 1500 gallons of water so your filter will consume carbonates trying to keep up. Your ph will drop as a result.
I use Lithaqua in my filtration to keep things stable, and I seem to recall getting it from a fella not to far from you... Seems like his name was Russell Peters

[MikeM]

First, fill a clean bucket with your source water. Test the pH when you first fill it and again after 24 hours. There may be something in the water which leaves once the water is not under pressure, altering the pH. This usually is the reverse of your situation... compressed CO2 lowering the pH coming out of the tap, with pH rising after a few hours. But it can also be carbonates in solution that settle out when not under pressure.

If the pH is stable in the test pail after 24 hours, then there is something occurring in the pond. My guess would be like Larry's & Russell's.... test the alkalinity of your source water. I'd guess it is low. The natural biofiltration process uses up what little there is, resulting in the pH shift. Be certain your pond is kept clean of debris. Leaves, mulm and such can greatly reduce pH in a low alkalinity situation.

Let us know what the alkalinity test shows. Then we may be able to do better than guess.

[KoiCop]

Nguyen . . .

What MikeM said.

Until we know what your test results are for pH and KH - both straight out of the tap and after aeration -- everything else is like shooting in the dark.

[nguyen4]

thanhk you everybody i will try and put up test results on chatroom next time on log in. To Russell, i did looking for calcium at all dealer n san jose but thay don't have it.

[Russell Peters]

Quote: Originally Posted by nguyen4 thanhk you everybody i will try and put up test results on chatroom next time on log in. To Russell, i did looking for calcium at all dealer n san jose but thay don't have it.

We have it at PSKoi. We are in Martinez.

[nguyen4]

i did see some beatiful koi from Japan( thru internet, dealer anh mag) but all of them is "made in Japaaaaan" Did we breed any koi or have anything by ours yet?

[dinh]

Quote: Originally Posted by nguyen4 i did see some beatiful koi from Japan( thru internet, dealer anh mag) but all of them is "made in Japaaaaan" Did we breed any koi or have anything by ours yet?

Hi Sir,

This is an International Koi Forum. The head quarter is in Japan indeed.

"have anything by ours yet?" Did you mean International koi, American koi or Korean koi? ;-))

BTW, Japan, not "Japaaaaan" ;-(

[nguyen4]

hi Dinh thank you to correct my english, i means amercian koi bloodlines? i didn't means japan bloodlines good or bad i just wonderful why american don't have anythings by american ways? by the way "headquater" in Japan so what?