Details can be skipped if you like. Question is at the bottom.

I bleached my holey rock and a used filter that had algae all over it. I read later that I might have used to much bleach. I say about a cup in only 3 gallons and it soaked for about 6 hours instead of 20 minutes. I then soaked it in dechlorinator. I then rinsed it off again really well. Finally I let it dry completely.

Next I put the rock and filter into a bucket of really hot water. Not boiling water. Just high temp. And now plan to soak in dechlorinator again.

My question in short. Is there anyway I can make sure this rock and filter is safe from the bleach before adding them to my tank? I don’t want to wait weeks :(.