onxy vs flourite

Jamie

Jamie

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Jul 27, 2003
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I've decided to use either onxy or flourite for the 150 i'm about to get. I like the look of the onyx over the flourite but Sea Chem says that the onyx will act as a buffer- hence raising my Ph/Hardness. Does anyone have any light to shed on this, - will I have to settle for the flourite? PS- I wish to add cardnials and rasporas to the tank which like a bit softer water.
 
I'm using onyx sand in a couple of 10 gallons and I haven't noticed any increase in PH so far. You could also use peat moss to help lower the PH, but I don't really think the onyx sand will affect it enough to make a huge difference. At least it hasn't for me so far. Hopefully others will have more experiences to share!
 
I used Onyx sand in my 90g planted tank hoping that it would raise my KH- after two months it might be up half a point, if that. My tap water is KH 2 so any buffering I can get is good.

What is your KH out of the tap?
If it is at all low I wouldn't worry in the least. Unless you are actually planning on breeding tetras (the eggs need specific conditions to successfully hatch) it is not really an issue- the fish themselves adjust fine to most aquarium conditions.
I'd go with whichever color suited me.
 
Originally posted by Cearbhaill
.........the fish themselves adjust fine to most aquarium conditions.
I'd go with whichever color suited me.
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I agree, I have both. As far as looks, they look equally good when wet! Both types benefit the live planted tank and I don't think the buffering of the Onyx is that strong. What's real nice is that there's no need for a layer of laterite! :cool:
 
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