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Old 02-02-2017, 05:20 AM   #1
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Exclamation pH won't go down- help!

Hi there,

I'm a new aquarium hobbyist, in fact today I just bought my first fish- neon tetras!
I've noticed that my pH is high in my tank at 7.6, yesterday I bought 'pH Down' from my local pet suppliers and dosed my tank last night, it was ranging at about 7.0/7.2, I thought perfect and slept on it.
This morning I tested my pH levels again and it had gone back up to 7.6, frustrated and confused I double dosed my pH Down and tested again hours later and it had gone back down. So I went out and got my fish and some driftwood just in case I had another pH raise. About an hour ago I tested my tank again and it had gone back up at about 7.5 (colour was between 7.4 & 7.6), so I added in my driftwood (I had previously sterilised it in boiling water and had it soaking for hours), a little while after I tested again and it was still at 7.5 so I added in more pH down and that's brought it down more.

I tested my tap water and it was at about 6.4/6.6, so I'm quite confused as to why it's so high in my tank. The only thing my Mum and I can think of is the substrate, although the type I got said it was 'triple rinsed' and I rinsed it again before putting it in my tank. I do have a rock in my tank but the pH was already high before I added it in. The only other things I had in my tank initially was an ornament (that I had rinsed) and my plant, I then added another plant when I added the rock.

I've read on other posts here that people suggest doing a daily 25% water change to lower the pH. My only other thought would be to use the Seachem Acid Buffer for my tank as I have a planted aquarium.
I also was messaging a friend of mine who has a tropical tank and who breeds cichlids and he told me that a lot of the fish that are bred at farms are bred in regular tap water and conditions as what mine are in so to try to not stress too much about it.

My tetras seem fine, no irregular behaviour, they seem pretty chilled and happy and playful. I really don't want to stress them out, I'd like to keep them alive for as long as possible

(also noted that my ammonia, nitrites and nitrates are all at 0)
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Old 02-02-2017, 05:30 AM   #2
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Honestly, I would not worry about it. You can do more damage while adjusting it (read: stop using the pH Down). Stability is more important than trying to hit a target.
Why is the pH much lower out of the tap? It could be due to gasses such as CO2 present in the tap. If you allow the tap water to sit out over night and test it again, you might find it is higher than your previous findings.
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Old 02-02-2017, 05:38 AM   #3
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Originally Posted by Fresh2o View Post
Honestly, I would not worry about it. You can do more damage while adjusting it (read: stop using the pH Down). Stability is more important than trying to hit a target.
Why is the pH much lower out of the tap? It could be due to gasses such as CO2 present in the tap. If you allow the tap water to sit out over night and test it again, you might find it is higher than your previous findings.
Thank you for your reply! It is quite unnerving being a newbie because you just want to do everything right to ensure your fish have the best lifestyle possible! I got a lot of the pH requirements and tips from the Fish Care sheets from Aquarium Industries, which says tetras max pH is 7.0. I'm glad I have this forum to learn from and share.
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Old 02-02-2017, 05:43 AM   #4
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You're welcome.
Here is a link to several articles you may find helpful. Read up on cycling if that is an area you have questions about.
Articles to Help you Get Started with your Aquarium
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