Caco3 Substrate In An Aquarium

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pinkdolphin_113

Sinclair Aquatic Systems
Joined
Jan 10, 2006
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United Kingdom, Scarborough
Hello everyone!
I used to be a regular user of this forum, but I've spent the past few years dealing with...well...life!
 
Anyway, cutting straight to the point, I bought the only true BLACK sand I could find on the internet (my area is terrible for aquatic item purchases you see), but it turns out that it is a substrate used for reptiles etc, and is made up of CaCO3.
As I say, I've spent a few years away from fish keeping, so a few things didn't enter my thoughts and a few things probably still haven't entered my thoughts about this.
 
I understand that my pH will have risen, but will it change with temperature also? I only ask because there is no heater just yet (I do plan on adding a heater) and as far as I'm aware there can't have been much of a pH change as the aquarium water is ~7.5pH and my tap water is ~7.0pH (very hard to distinguish the difference).
My other concern is also that the 4Kg bag I bought has covered only HALF of the aquarium floor so I will be needing to buy another 4Kg....is this going to increase pH further?
 
Once set up properly, I am hoping to hold south American fish so I understand that the pH would (preferably, but not strictly) have to be slightly acidic.
 
 
Cheers,
Pink.
 
Hello again :)
 
As you want to keep fish, which prefer soft and acidic water, I would go for a different substrate (remove the black sand again). CaCO3 will harden your water and increase your pH over time, and that is nothing you want.
 

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