disease???

Question
Hi. I have a 30 gal freshwater tank. I have 3 glow (2 red and one yellow) danios, 2 female guppies, an algea eater, a beta, and 4 ghost shrimp. With one purchase of fish, I ended up with one very tiny (size of a pencil eraser) snail(their shell is semi-transparent). Well....the snail reproduced and then I had probably 20. Recently I started noticing a small glob of slimey stuff with little white dots suspended in them stuck to the decorations, sides and on the bottom of my tank. I decided to clean my tank, as I have never had these before. I removed my fish to another tank then got busy taking each item out, throroughly cleaning the slimey substance off, dipping each item in boiling water to sterilize and re-introducing to tank when cool. I also vacuumed my gravel and did a partial water change. After I had all the "decorations" back in place, I re-introduced the fish and shrimp. I removed all snails and did not put any of them back. I have noticed that there have been a few more "clumps" of the gooey clear substance with white dots.

Can you tell me exactly what this is, is it harmful, how do I get rid of it?

Everything I have read about the snails laying eggs, they do that just above the water line-so I am assuming that isn't the case. Also, I have researched the rest of the breeding habits of my other fish and shrimp and this doesn't fit any of those either.

Can you tell me what the slimey clear goo with the white spots suspended inside is?  

Is it some sort of diease or is it eggs?

How do I get rid of it?

Answer
The snails you have are probably common Pond snails.  Most breeds of desired aquariums snails lay there eggs above the water line.  The snails you have are the unwanted kind.  They reproduce like made and destroy plants.  The slimey stuff with dots are snail eggs.  I have struggled with pond snails for years and have only come up with 2 things that have worked.  First, you can buy a loach, doesn't really matter what kind, most eat snail.  I have a Yo-Yo Loach that does a great job, but I have had Weather Loaches and that works too.
Or Secondly, you can bait and remove them.  Put a slice of zucchini in your tank over night and take it out in the morning when it is covered with snails.  Both are good for controlling the snail population, but won't get rid of all of them.