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Old 09-11-2007, 11:57 AM   #11
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Seems to me the simplest experiment would be to do more frequent PWCs and see if that doesn't help. Sure, it's a pain - but if you want your pH higher, you're going to have to change something you're doing.

Even though "chemically" you shouldn't have an issue... you do. Sometimes the best thing we can learn about our systems is that we really don't understand them fully. I read somewhere (and I wish I'd written who wrote it) that it's absolutely ridiculous to think that by testing just a handful of water parameters, we can fully understand what our tanks are doing. Makes sense.
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Old 09-11-2007, 03:18 PM   #12
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hm, you guys might be right.

ill give a 20% change a shot to see what happens. probably wont happen till the weekend though.

ps 8.0 was my reading last night. im gonna wait a little while and check my ph after the lights have gotten a change to work, and if the ph doesnt change, according to that article, i have adequate aeration
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Old 09-18-2007, 11:54 AM   #13
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You said in another thread that your pH problem was solved. Just in case others are searching for answers in the future and find this thread, what finally solved it for you?
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Old 09-18-2007, 08:50 PM   #14
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kalkwasser did the trick. whatever seems to be the imbalance with my low ph, i whip up a gallon jug of kalk and add like... maybe a quart every few days (at the moment, still testing to see the exact right dosage) but since I started doing that, every time i check (day or night) my pH has been 8.2.

alk is finally coming down to, i tested it saturday and got 10.4 and had to tell myself 'no actually thats still high' cuz that, for me, as been low usually lol.
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Old 09-19-2007, 02:35 PM   #15
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Just a quick response, I did not read the whole thread. Low PH w/ proper Alk is usually a sign of excess CO2 in the tank. That can be caused by a few things ie. high CO2 levels in the air in your house(open a window, see if it helps), not enough flow in the tank for proper o2 exchange, etc. Dosing limewater will not only raise Ca/Alk levels, possibly too high, it will also cause calcium to precipitate on equipment necessitating more frequent tank maintenance. I would only use kalk if you have stoney corals that consume a lot of Ca/Alk on a daily basis. 7.9 is not too bad. As long as it stable and not going below 7.8 at night, I would leave it. FWIW newer tanks, under a year old, often have lower PH due to high organic levels. Your tank may just need more time to mature.
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Old 09-24-2007, 08:01 PM   #16
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I read this thing a few times.........whewwww!

I think MT79 pretty much summed it all up. Regarding kalk, when you say.." i whip up a gallon jug of kalk and add like... maybe a quart every few days", you are aware kalk should be dripped? It has a pH of 12+ and doing more than dripping can cause major pH problems. The pH varies in a tank from night to day. You will always have a higher pH in the day with all the lights on and everything "awake" than you will early in the AM before lights are on.

You say you don't plan on doing water changes? I sort of got a chuckle out of that. I've had my tank set up for close to 20 years and I can assure you, by not doing water changes will have issues eventually, especially if you still have those 4 soon to be huge tangs - 1 powder blue tang, 1 sailfin tang, 1 naso tang, 1 yellow tang.
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Old 09-25-2007, 12:21 AM   #17
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hm, didnt know you had to drip kalk, ill have to start doing that. is there any way to know how to start a drip? as in, use a baseline speed (say... start off at 1 drip per minute and inrease as needed?)
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Old 09-25-2007, 09:23 AM   #18
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Typically kalk is used as your top off water. You mix 2 tablespoons with 1 gal of RO water, mix it up good and then let it settle. You drip the clear liquid and leave the undissolved stuff in the bottom of the container. Depending on your ca/alk consumption, this may or may not be enough to keep your levels where they should be. Test you water each day for a few days without adding anything and see how much is used by the tank. If you evaporate 1 gal of water per day, drip 1 gal of kalk and test to see if it kept your levels in line. Remember, kalk is used to maintain ca and alk levels, not to raise them. The key to success is stability.
I dripped kalk for a few years and it gets to be a pain. Kalk will clog up drip lines pretty fast. I found it much easier just to do daily doses of Randy's 2 Part.
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Old 09-25-2007, 10:40 PM   #19
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Agnate80700, here are two articles you may find useful. One is a simple DIY drip doser, the other has just about everything you need to know about kalk.
http://www.reefkeeping.com/issues/20...nftt/index.php
http://www.reefkeeping.com/issues/20...f/index.php#17
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Old 10-05-2007, 10:39 PM   #20
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So heres the latest...

I did the drip kalk thing for a few days. My original feeling that the pH issue was solved with adding kalk was kaput as soon as I couldnt add kalk as a dose, but instead had to drip... this caused my pH to return to 7.8.

So at that point I was totally stumped. I talked to a few guys at my LFS and they suggested pointing my powerheads up to the surface... but as I've mentioned here I really dont think it had anything to do with my aeration, but I was getting desperate and gave it a shot. To no avail.

Thats when I just gave up for a few days. I just could not understand what was going on. Everything was as it should be. I reread a few pH articles and I affixed peticular attention to the part about co2 causing pH to drop, and how adding kalk uses up availible co2, thereby raising pH in the process. I know from before adding kalk in a dose got my pH back to where it should be, so I began to wonder: was the pH rising because adding the kalk in large volume soaked up seriously over-abundant levels of co2? And if so, how did it get there?

I then decided that there just might be too much co2 in my home's air. The 1st go around of problem solving, I passed that option up because I thought my house was old enough to be not-air-tight to the point excess co2 couldnt possibly be the issue. But now I'm a desperate guy willing to try anything. So I gave it a shot. I opened the windows right next to the tank overnight.

AND WOULDN'T YOU KNOW IT. The next afternoon, after having the windows open for around 14 hours, I checked my pH and it was smack at 8.3. Unbelievable. In fact, I still dont fully believe it. I'm still monitoring everything to rule out any other possibilities, but after 3 days it seems to be the definite culprit.

1) Began with pH 7.8.
2) Next day, windows open 14 hours, pH 8.3
3) next night, room mate closed windows (didnt tell him what I was doing) Next morning, about 3 hours after lights on, pH 8.0
4) Reopen windows, few hours later pH 8.3
5) that night windows closed again (roommate has been informed at this point, now just being difficult) reopen windows... ph 8.2
6) today, windows open pH 8.3


The only thing is that it seems to fluxuate so quick, its hard to believe opening the windows is that effective, but like I said, thus far it seems to be.

Problem is, this is really only a temporary fix. The weather is pleasant right now and the window being open really doesnt affect the temp in the house, or the tank for that matter. When fall and ultimately winter rolls around, thats just not an option. So.... Im trying to ween the tank off the window right now, and instead see if house plants can take care of the co2 (i have the window cracked at the moment and 2 big green plants I just bought from Meijor's.) I'll check in the morning to see where we're at.
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