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Old 09-09-2007, 09:05 PM   #1
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raising ph

I've always used seachem marine buffer to bring my ph up, but it also raises alkalinity. My weekly testing has shown that by the end of the week my ph could use a boost, but my alk doesnt need any (as it stands, my ph is at 8.2 but dKH is 13.4, after adding. Before adding yesterday it was ph7.9 and dKH 10.8)

Is there something that will raise ph but not alk?

side thought... is there something underlying thats causing the ph to drop? Seems as if the ph should be more stable.

ps ive got a 6" dsb.
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Old 09-09-2007, 09:47 PM   #2
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Here you go: http://www.advancedaquarist.com/issu...e2002/chem.htm
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Old 09-09-2007, 09:57 PM   #3
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I got to ask. What salt are you using? I only ask because I had the same issues with instant ocean. Many people can use it with no ill effects, but I can only tell you my expeirence with it. I switched to Tropic Marin and my ph issues were gone. My ph stays at a steady 8.2 everyday. All I do is do monthly water changes and dose with calcuim now and then. I stopped spending money on buffers and excessive water changes. I am not saying use Tropic marin, but look at your salt too when you are fighting ph problems. Somewhere there is an imbalance. Find a salt that is as close to NSW as possible and then ask people who use it just in case it's stated and not actual true claims before you add more chemical to "fix" things. I forget who told me to do this before, but once I did it I had no more headaches with my tank. Not even algae issues. You can try and fix it, but if it's your salt, you are going to have the same problems each time you do a water change or as time goes by. Temporary buffers only last so long, what matters is that you have the right balance from the get go.
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Old 09-09-2007, 11:29 PM   #4
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i read a different version of that article right after i posted this, but it confuses me still. My situation is that I have high alk but low pH, so it appears limewater would be a good solution? I guess its telling me I have high indoor CO2 levels.. but this house isnt new or anything, and its near the front door which isnt sealed particularly well so I dont think thats really whats happening

somehow a surplus of co2 is getting into the system, dropping the pH if im understanding?

---edit---

Oh yeah forgot to mention, I use Reef Crystals, however I dont do pwcs.

To me, you either have the headache of doing a pwc bi-weekly (at the rate my system depletes the elements that get added back in during a pwc) or just adding the necessary supplements. Personally, I feel that a little hand-held container of calcium and a measuring spoon is a heck of a lot less pain-in-the-arse than trying to mix, allow to settle, drain, and fill 30 gallons of water.

My pH is stable at 8.0/7.9 during the day... I have not checked it at night, ill do that this week and see whats up... but according to both the article I read and the article posted, 7.9 is an acceptable level with alk as high as it is in my tank (the high alk offsets the low pH as far as the corals are concerned) which is ok in my book... as long as I dont see it slip below that. I would really like to pinpoint where the low pH is coming from. Chemically, I shouldnt be having an issue, and I think It may be due to an outside source.
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Old 09-10-2007, 10:32 AM   #5
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You can add more phs to increase the O2 exchange, at the surface of your tank. I tried to add buffer, but it was a pain to have to do it every day. I would rather do PWCs instead of adding suppliments and testing every day for the parameters. If you don't do PWCs, what are all of your water parameters?
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Old 09-10-2007, 01:11 PM   #6
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Old 09-10-2007, 02:07 PM   #7
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Is your tank open top or closed . Try to point a power head to the surface of the tank also opening a window and blowing a fan across can help increase the PH I use egg crate to keep an open closed top on my tank the PH stays at about 8.4 with it being lower when lights are out .
Are you testing with the lights on or off they tend to be lower when lights are out .
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Old 09-11-2007, 01:55 AM   #8
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Well first, would pwc really help in this situation? Some factor is lowering my pH, is that going to be fixed by a pwc? I think a pwc is just going to bring my pH back to where it should be, and it will fall again as soon as what ever is causing it has a chance to do its thing. My pH *should* be stable based on my parameters, everything Ive tested is right where it should be (cept mag is a tad low, 1200)

I would love to think that it was just an issue of gas exchange, but #1 I have a wave2k unit that is very close to the surface and I get a lot of water churning. Secondly, my sump flows about 1200 GPH out of two 1 inch pvc pipes... its a torrent of water and churning and crazyness in that 1st phase of my sump, so I really do think im set there. (so much so that if I turn my skimmer off, that section of the sump turns into a skimmer and I get the foam buildup. its THAT much activity)

Ill break this down....
* A calcium carbonate/carbon dioxide reactor (CaCO3/CO2 reactor) is in use on the aquarium.
I dont have a reactor so theres that
* The aquarium has low alkalinity (substantially below 2.5 meq/L, or 11 dKH).
My alk is 13+, so thats not it
* The aquarium contains more CO2 than the surrounding air due to inadequate aeration. Don't be fooled into thinking that an aquarium must have adequate aeration because its water is very turbulent. Equilibrating carbon dioxide is MUCH harder than simply providing adequate oxygen. There would be NO diurnal pH swing if carbon dioxide were perfectly equilibrated. Because most aquaria's pH is lower during the night than during the day, they are demonstrating incomplete aeration.
Possible but geez, I dont see how I can mix up my water any more than it is
* The aquarium contains excess CO2 because the air that it is being equilibrated with contains excess CO2. This is the most common cause in cases that I have discussed that involve more than a thousand aquarists mentioning pH problems.
possible, but my house isnt new or anything and its not terribly airtight, the tank is also in a room with the front door and 3 large windows
* The aquarium is still cycling and excess acid is being produced by the nitrogen cycle and the degradation of organics to CO2.
lol definetly not still cycling


Im wondering if my problem is high co2 in my home... its doubtful but I might as well try the little experiment they suggest. I shall report back, heh.
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Old 09-11-2007, 08:11 AM   #9
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Quote:
Originally Posted by Agnate80700
Well first, would pwc really help in this situation?
Yes it would. Fresh SW during a PWC is a buffer. Hence the suggestion for frequent PWC`s. IME I keep a constant 8.4 on my PH just by doing frequent PWC`s. Not always but alot of times I have known people that do not do them much at all and most seem to have a problem with their PH. Just my observation.
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Old 09-11-2007, 08:28 AM   #10
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Quote:
Originally Posted by melosu58
Quote:
Originally Posted by Agnate80700
Well first, would pwc really help in this situation?
Yes it would. Fresh SW during a PWC is a buffer. Hence the suggestion for frequent PWC`s. IME I keep a constant 8.4 on my PH just by doing frequent PWC`s. Not always but alot of times I have known people that do not do them much at all and most seem to have a problem with their PH. Just my observation.
Absoluetly it should help . Just prime your water over night with a power head ....
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