Newby Help!

[turnnidge]

Hi guys,

I have just noticed that one of my clown loaches has got one white spot well it looks like a lump, although its small he has been rubbing against the gravel too!

Oh and also I have noticed that a few of my male guppies have started to swim up and down the tank and rub against the gravel.

Any ideas and how can I help them to stop?

 

[WILDER]

How many gallons is the tank.
How many fish and which type.
Water stats in ammonia, nitrite, nitrate, and ph.
Whitespot look like the fish has been sprinkled in salt, and the spots are the size of a grain of salt.
Clown loaches are prone to whitespot.
Need to rule bad water quality out as that can make them flick and rub.