A couple of notes for your reference.
Ich is a parasite, if it isn't in your tank then nothing but you introducing it will cause it to show up. It does attack weakened and stressed fish more readily, but as OG said. If you q tank new fish and don't introduce ich you won't have to worry about it.
Melafix to the best of my knowledge will not kill ich (someone may correct me if I missed something) As mentioned earlier, meds (at least the ones that do kill ich) are very hard on loaches. Salt will do the job.
The temperature discussion is one of those things that is greatly mis interpreted when it comes to ich. Rapid temp drops will weaken a fish immune system and in a tank that has an active ich life cycle already this usually causes an outbreak very quickly. Warmer temps may or may not be a good idea for certain fish, but in the discussion of ich Planned tank temperature is really irrelevant. Since higher temps speed up ich's life cycle, if anything else stresses the fish and there is ich in the tank, the outbreak will usually be quicker and more severe with higher temps up to the point at which it is too warm for ich.
So in a nutshell, make sure you don't have ich in your tank already, buy your loaches (I highly reccomend quarantine) and then enjoy them at whatever temp you feel is best.
More info on ICH:
http://www.aquariacentral.com/forums/showthread.php?t=39759
More info on Quarantine:
http://www.aquariacentral.com/forums/showthread.php?t=46875
Just remember that if you already have ich in your main tank and don't know it, any stress could potentially cause an outbreak.
Dave
Ich is a parasite, if it isn't in your tank then nothing but you introducing it will cause it to show up. It does attack weakened and stressed fish more readily, but as OG said. If you q tank new fish and don't introduce ich you won't have to worry about it.
Melafix to the best of my knowledge will not kill ich (someone may correct me if I missed something) As mentioned earlier, meds (at least the ones that do kill ich) are very hard on loaches. Salt will do the job.
The temperature discussion is one of those things that is greatly mis interpreted when it comes to ich. Rapid temp drops will weaken a fish immune system and in a tank that has an active ich life cycle already this usually causes an outbreak very quickly. Warmer temps may or may not be a good idea for certain fish, but in the discussion of ich Planned tank temperature is really irrelevant. Since higher temps speed up ich's life cycle, if anything else stresses the fish and there is ich in the tank, the outbreak will usually be quicker and more severe with higher temps up to the point at which it is too warm for ich.
So in a nutshell, make sure you don't have ich in your tank already, buy your loaches (I highly reccomend quarantine) and then enjoy them at whatever temp you feel is best.
More info on ICH:
http://www.aquariacentral.com/forums/showthread.php?t=39759
More info on Quarantine:
http://www.aquariacentral.com/forums/showthread.php?t=46875
Just remember that if you already have ich in your main tank and don't know it, any stress could potentially cause an outbreak.
Dave