Since you have the 1500 and it has been up and running for a while, this might not be the best idea. Running your filter on someone else's tank is a GREAT way to import parasites and other nasties into your aquarium. If you really want a good, clean jump on establishing the filter, get some bio-spira and use it.DBL TAP;1613116; said:Find someone with a healthy established tank and then ask if you can run one of your filters on that tank for 24 hours or more.