It was a one two punch and half my fish are dead.  The first wave was fungi, which took out all the guppies.  After almost a week of fungi treatment with PimaFix, I noted a differnet type of stuff on the loaches and rams.  With the help of friends, we determine it to be Ick. 

The second punch was the Ick.  We got Ick Guard II because we have loaches and the other Ick treatment would kill it. 

The first to go was a small loach.  And than another, and if history repeats itself (when one spiece dies the entire group goes), until they were all gone.  Now, the German Rams were the first to get rid of the little white spots on their bodies.  Two neon tetras died.  In total, we lost 6 guppies to fungi, 2 large clown loaches, 3 small clown loaches, and 2 neon tetras to Ick. 

The tank is now just half full with medication for Ick.  I think the medicine is givin the Pleco some form of fish diarrhea.  I am going to get about 5 gallons out and replentish with fresh water.  I am still keeping a close eye on the remenants of Ick, which is still visible on a few neons. 

Well, 75 gallons is a big tank and it is a lot of work when you have trouble.  The water here in Toronto is too hard and has to be treated.  The water fitler takes out the calcuim and helps soften the water.  It also helps prevent out of control scaling.  But, it takes forever to go through the water filter jug by jug.  For a 75 gallong tank, I am beginning to think that a water filtration system is appropriate.  Or, have at least a couple of 5 gallons tank ready.  Any way you look at it, you are dealing with a lot of water.  So, be prepared to do a lot of work.