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Old 04-20-2012, 04:29 PM   #1
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PH issues

Hi,

Anyone got any ideas as to why I'm finding it hard to control my PH. I use redsea reef foundation A,B,C and now I'm using waterlife PH buffer to try and drive up my PH but it's still sitting at PH7.8?

I've conducted all the norm test as follows.
SG: 1.025
Temp 23C
Ammonia: .25ppm
Calcium: 390 just topped up to 465mg/l
Nitrate:20ppm
Nitrite:0ppm
Magnesium:1290 just topped up to 1390mg/l
Alkalinity 2.8meg/L Keep trying to top-up to 4.5 for my SPS using Reef Found B

Any help or pointers would be great. I should say I norm do a 10% water change every 6 to 8 weeks.

Thanks
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Old 04-20-2012, 10:31 PM   #2
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Do me a favor and check your PH about an hour before the lights go out. That will give a truer reading. Let us know what it is. Also salt water is a buffer. If I were you I would do a 10% PWC every two weeks. At the most every month. If you are going to go 6-8 weeks I would do 25% PWC`s. JMO
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Old 04-21-2012, 04:01 AM   #3
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I do have a sail fin tang & orange spot
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Old 04-21-2012, 04:19 AM   #4
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sorry the above reply was to another post
I think 10% every 2 weeks for a 500ltr tank is a bit to much.
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Old 04-21-2012, 07:56 AM   #5
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10% every 2 weeks should be the minimum amount of water changes you do. I do about 15% every week on my 125g tank.
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Old 04-23-2012, 03:01 PM   #6
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Quote:
Originally Posted by melosu58 View Post
Do me a favor and check your PH about an hour before the lights go out. That will give a truer reading. Let us know what it is. Also salt water is a buffer. If I were you I would do a 10% PWC every two weeks. At the most every month. If you are going to go 6-8 weeks I would do 25% PWC`s. JMO
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10% every 2 weeks should be the minimum amount of water changes you do. I do about 15% every week on my 125g tank.
+1 on what Mike and Larry have stated. Weekly pwc's are best, every two weeks+ if you have to.
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Old 04-23-2012, 03:10 PM   #7
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Also, you should have 0ppm ammonia.
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Old 04-23-2012, 03:36 PM   #8
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Gents just to keep you updated I did a water change over the weekend sg is still a little high after the change (sg 1.027) ive just lowered this to .024 today, I will check the ph again tomorrow, something I did not say before is I do have a water trickle feed which comes direct from my ro unit. I think it could be this that is lowering my ph.
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Old 04-23-2012, 03:42 PM   #9
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So you are using your RO/DI as an ATO? I'll assume there is some sort of float or something that makes sure it all doesn't overflow. I don't see how this would cause a issue with pH. If your pH is at 7.8 and you shoot for ~8 I don't see why we are worrying.
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Old 04-23-2012, 03:47 PM   #10
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Yes I have a float system setup on my tank, I like my ph to be around ph8.2 which I get after a water change but then it drops no matter how much I put buff in! I was thinking maybe because the top up water ie not salted was lowering my ph?
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