I need urgent help in respect of my two Orfe s - here are the details - I have a 1000 gallon on pond / approx 5000 litres - I have five fish - which are 1 koi - 2 goldfish -2 Orfes - on Sunday March 1st I noticed the 2 Orfes lying on the bottom of pond on their backs - I immediately cleaned the filters ( last done October ) the other 3 fish totally ok no problems - next day I tested water - med reading of ammonia so I immediately did 50% water change & 20% the next day - p12 days later the pond is clear of ammonia and nitrate however one Orfe spends most time at bottom of pond on his back the other one just sits near surface right way up plus he has pink blotches on him - can anyone advise me what I should do next as its heart braking to see them like this - do I change water again of clean filters again - I'm at a loss - if anyone can advise I would be most grateful indeed