Ac30fan
Aquarium Advice Activist
So, I'm considering swapping my current substrate with either sand, or finer/smaller size gravel.
Can this safely be done all at once without risk to the bb established in my tank? How much bb resides in gravel anyway?
I have 29gal with a Fluval 206 and Marineland bio wheel 200.
Thanks
B
Can this safely be done all at once without risk to the bb established in my tank? How much bb resides in gravel anyway?
I have 29gal with a Fluval 206 and Marineland bio wheel 200.
Thanks
B