I bought a used 75G tank on craigslist. It came with two Emperor 400s with 4 used biowheels. The biowheels are completely dry- I think the aquarium has been unused for at least 2 months.
Can I reuse the biowheels, or should I replace them to avoid possible contamination?
Can I reuse the biowheels, or should I replace them to avoid possible contamination?
take it down a notch