Mystery Snail Problem?

I just recently started keeping fish, so I'm not sure if this question would be better suited to the freshwater newbie forum, but my question deals with my black mystery snail, who I just got last week. I'm keeping him and my betta fish in a 1.5 gallon aquarium with a whisper filter, and I've been feeding the snail tetramin variety wafers- they're little sinking algae/food wafers for bottom feeders. The fish likes to eat them too sometimes.

Anyway, today I noticed that my snail is exuding/expelling lots of little orangey vaguely oblong things-- they're very small, and I don't know what they are! I don't think they're eggs because they're not all in one sac or floating to the top, but rather one bit seems almost attached to the glass and then lots of individual little speck-things are drifting down. I'm concerned because I don't know if it's just snail poo, or something bad like parasites! If it helps, he seems ok otherwise, and was chugging around the tank just yesterday.

Ok, that's good! I was googling "snail poop" and variants thereof for awhile and couldn't find any pics, so I was like aaah. Ok! I didn't know that-- I discussed what I could put in the tank with somebody who apparently is very knowledgeable about fish and she said a snail would be fine. :/ Dang. :/ Ok, I'll look into getting a 2.5 gall! 'Til then I'll just do a complete water change 2x/month instead of 1x-- I'e also been doing weekly 1/4 water changes.