Exotic Pebbles Black Bean Pebbles, 20-lb bag
$22.99 Chewy Price
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11 Customer Questions
What kind of stone are these pebbles made of? They look kind of like blue slate but also look similar to blue limestone. I just wanted to be sure as I believe limestone will raise the PH quite a bit.
Answer by • Apr 30, 2018
The Black Bean Pebbles were formed by hot magma erupted from the underground. The raw material for the Black Bean Pebbles is Volcanic rocks.
Are these pebbles porous? As in, do they have tiny holes for beneficial bacteria to grow?
Answer by • Sep 10, 2019
These pebbles are not porous.
Will these pebbles affect the PH level of a freshwater aquarium?
Answer by • Jan 18, 2018
The Pebbles may affect the PH levels of the freshwater slightly but we haven't received any comments on this before.
How many bags will I need for a 75 gallon aquarium
Answer by • Mar 16, 2021
Determining how much substrate to buy for your aquarium depends on the size and shape of your tank, as well as the depth of the substrate bed you wish to achieve. We suggest 1 pound of substrate per gallon, to achieve a 1 inch bed or 2 pounds per gallon, for a 2 inch deep bed.