I'm picking up my new wild caught Heckel tomorrow & not sure which of options I'd be best to use.

Option 1: Empty 100gal QT wich was to be filled from water from my discus tank. Around 13.03.08 when I knew I was likely to have new wilds, I put a sponge filter into my discus tank, to pick up some good bacteria, which I could transfer to the QT when time came (which it has now).

Sponge is still there, trouble is, as this thread discuses http://www.discusforums.com/forum/vi...019&highlight= on 26.03.08 I had pull out a sick apisto (new) from the discus tank, that had 2 strange growths on it. So, now unsure whether I should use the sponge in the discus tank now for the new Heckel

Option 2: is the divided dwarf cichlid tank, which has also been the subject of a thread http://www.discusforums.com/forum/vi...882&highlight= In this case, I suspect some new dwarves brought in worms & infected 2 long standing female aggies. Tank has since gone through full 4 week Big L & Prazi treatment. Treatment finished around 13.03.08 & no-one in there seems sick (but I did suspect at least one of it's residents was a carier of worms). Would the treatment have gotten rid of worms from carriers). The 2 fish that had the worm symptoms have been removed to another QT and seem to be doing well for the moment. Is this 2nd option safe for the new Heckel? Tank in Option 2 is pH controlled by C02, so it will be easier to keep pH low in this tank

Option 3. Use the currently empty 100G QT with a new sponge for the filter - but this means no bacteria being in the new tank. Also, this tank will need to have pH controlled by chemicals, to keep it low enough for the Heckel's liking.

What do you think my best option would be?