Originally Posted by
atlantadiscus
Sure,reuse the rings,As long as they are clean,they are functional.
Lava rock was quite popular as a bio media years ago before the specialists figured out a way to charge us 10x for a engineered media.As long as it is not been treated with any chemical,it is fine to use.Some will say it will change your PH,but not sure that is anything but a long drawn out myth.Take a bucket of aquarium water,measure the PH,drop the rocks in,measure again in a day or so,you will know for sure.