Tank continually going alkaline. - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 16 Old 08-06-2013, 12:09 AM Thread Starter
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Tank continually going alkaline.

That's pretty much my only issue. I did my water change today, I was using tap water but I let the chlorine evaporate over a few days and hardened the water a bit. The water I added was neutral, but I went straight to blue in the tank. I've uploaded some pictures of the set up, I only added the driftwood today, but this was happening before that. I'm trying not to use chemicals, but I don't want it to get too alkaline.

Is this a big problem, no fish have died, just a tad worried about it, I like the test coming back green.

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My tank is about 50 gallons, 190litres (that's to the water level). My equipment is as follows-
Resun Ae-808 canister filter. I have charcoal, bioballs, biomesh and a filtermesh in it's 4 sections.
A 200W heater
An 18W sunlight light
Dual valve air pump
And all the chemical odd and ends.

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That's my current set up. The nitrite are at 0ppm, so it's filtering correctly. Maybe it's the shells in the supposedly "natural gravel" mix.

Fishtank August 1st - Imgur - that's just some pictures of the tank. I've changed a little, but the glare is horrendous and can't get a decent picture. Nothing major has been altered, the drift wood was all that was added.
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post #2 of 16 Old 08-06-2013, 12:24 PM
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When you say alkaline assuming you mean above 7.0 on the Ph correct. You know the number exactly?? What fish do you have in there now? Also you know what your hardness of the water is both GH and KH in your tank and your tap water?

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post #3 of 16 Old 08-06-2013, 05:25 PM
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Exactly what did you do to harden the water?
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post #4 of 16 Old 08-06-2013, 08:28 PM Thread Starter
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Quote:
Originally Posted by Boredomb View Post
When you say alkaline assuming you mean above 7.0 on the Ph correct. You know the number exactly?? What fish do you have in there now? Also you know what your hardness of the water is both GH and KH in your tank and your tap water?
Yeah, its about 7.5-8.5. I don't the exact ph, only have bromethyl blue indicator, no electronics here :(

And the GH in tank is ~50mg/Litre and KH is ~40mg/Litre. The tap water is so soft it doesn't even indicate with my tests, the sample changes colour on the 1st drop, so both are below 10mg/litre. I am using this as my water conditioner currently.
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post #5 of 16 Old 08-06-2013, 08:47 PM
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Do you use that conditioner at recommended dose?

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post #6 of 16 Old 08-06-2013, 08:54 PM Thread Starter
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Do you use that conditioner at recommended dose?
Yes, least I did when I set the tank up and when I do water changes.
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post #7 of 16 Old 08-06-2013, 09:03 PM
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What fish do you have in this tank just out of curiosity?

That conditioner contains salts and minerals in. It will raise the hardness of your water and your Ph will follow. This explains the difference between your tap water and your tank water. It also raise the salinity of the water.

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post #8 of 16 Old 08-06-2013, 09:09 PM
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Reading more about it that may or may not be the reason.

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post #9 of 16 Old 08-06-2013, 09:09 PM
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Do you have any shells or rocks in there that you are unsure what they are?

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post #10 of 16 Old 08-06-2013, 09:26 PM Thread Starter
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Do you have any shells or rocks in there that you are unsure what they are?
All my decorations are plastic and have been previously used. There's a chunk of driftwood about 30cm(a foot) long. There are small shells in the gravel mix, which is my guess on what it could be.

I have Gourami's, Glass Catfish, Peppered Cats, a sucker cat, some neons, kuhli loaches and some small clown loaches.

Last edited by Aaron92; 08-06-2013 at 09:28 PM.
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