Backyard Aquaponics
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My media is raising my ph what is the normal ph of any media like expanded clay

The idea of expanded clay was that it is supposed to be pH neutral. That being said, I have read that all expanded clay is not created equal.

My suggestion

Fill cup with tap water. Test pH. Let sit for 24 hours. Test pH. Add media and let sit for 24 hours. Test again.

Remember that the nitrification process drives pH down so eventually it could work out fine.

What's your pH?

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My ph is siting at 8.4


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Would lava rock work fine

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What media are you using now?

Lava rock, or scoria, can vary in its pH. Mine will drive pH up to the low 8's, but will drift down as the process really gets going. I'll spray leaves with iron to try to help their deficiencies in the meantime. The fish don't seem to mind much.

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I'm using pea pebbles it has my ph up around 8.4

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You can treat your top up water a bit with hcl and try to bring it down that way. I'm going to bet your pea gravel has a lot of quartz in it.

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Would you suggest me treat the water or try switching media

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It's hard to say. If you have too much quartz you might never bring it down.

When I first started I had pH issues and was going to change it out. Most said to wait it out which I did. It resolved after a few months.

In system 2 I had pH issues again. I waited it out, treating the top up water like I did on the first one. One day, the pH crashed and then I had to add egg shells and other stuff to bring pH up.

Hard to say what you should do.

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When I've added Fe-EDDHA iron to my system pH went down from 7.8 to 5.9.

I was really worried for my silvers but they cooped well. I have also about half ppt salt and aeration going full steam. They are all good.

Do you have fish in your system? If not, treat the top up water with Hydrochloric Acid to pH6 and gradually add this to the FT.

If you have fish, it should acidify in time. Do you see any adverse affects on the fish or veggies? Most nutrients would be locked so there might be some deficiencies on your veggies.

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I think there is quartz in it I dumped it I have expanded clay now I'll keep this thread updated with my results.

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Thanks for your help silver bullet

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I don't have fish in the system yet I switched over to expanded clay I had a pea peable mix that was raising the pH

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The easy test of pebbles/gravel is with cooking vinegar. I grabbed 3 handfuls of different gravel I had available, including some my wife liked, and with each type, halfway filled a nice clear drinking glass. In each I poured in 1 cup of white cooking vinegar. I had 2 types that did not bubble at all -- so they did not have alkaline qualities that would push up pH and and one that did. The white gravel my wife liked of course was limestoney and it bubbled like soda pop left sitting in a glass for 1+ hours -- not super gaseous, but enough where one always saw bubbles rising (4, 5, or 6 at a time rate.) The alkaline white gravel would have always been pushing for a higher pH (which if properly regulated might not be such a bad thing?) while the other two gray gravels did not bubble at all and were not alkaline.

So easy to do and it could save hours of shoveling (if you use gravel you're not happy with.)

--
Sam

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Jardín Acuaponía #1

What did it settle at?