I finally managed to fish out a comet/goldfish mix from my pond that I noticed has been bloated and has the pinecone thing going on...my question is what do I do with it now?? are the other fish potentially going to come down with it? and is it any relation to the leeches that have turned up this year?? help! I haven't had any other trouble with the pond until this year-having issues keeping it clean even with several filter cleanings (and it was FILTHY)...any advice would be appreciated!!