I Want To Vary The Food I Feed My Fish, Help?

[KrystaK]

So I have a 30 gallon tank what has a pearl gourami, 5 Platys, 7 Neon tetras, 6 Panda Corys and a BNP. It also has cherry shrimp and 5 mystery snails.
 
I currently feed flaked food 5 days a week. frozen blood worms 1 day and then fast on the 7th day. 
My bottom feeders get either a bottom feeder pellet or an algae wafer a day plus whatever the free swimming fish don't eat that reaches the bottom. Once or twice a week I also add some blanched zucchini.
 
I'm not really interested in live foods, but other frozen foods are okay.
I was thinking I could add blanched pea's to their diet perhaps one day a week, maybe the day before their fast, just to make sure they aren't constipated or bloated.
 
But I was wondering if there was something else I could feed my tank, particularly my snails. They don't seem as active as they could be. I was wondering if anyone has any suggestions? 
Also, I've read around the net that mystery snails can have problems not getting enough calcium. I've tried feeding them cuddle bone (Or whatever it's called, it's a bird treat) but they don't seem interested in it. 
 

 

[Freedom]

My mystery snails LOVE sweet potato.  I cut it to a 4 inch length, then cut that in quarter spears.  Boil or steam till soft.  It contains calcium which is good for their shells.  I put this in once a week.
 
I put in in then watch.  The snails stop, where ever they are, and then move as fast as snails can to that sweet potato!  They nosh non stop, or so it seems.
 
I've attached a photo, on the right is a strip of cuke and a piece of sweet potato, in my 50 gallon for 10 hours.  On the left ditto, in my 37 gallon for 10 hours.  I know, cuke has minimal / no beneficial nutrition, I just put it in as a treat once every 2 weeks.  I do put in zuke strips weekly.  Anyway as you can see, they did a LOT of eating in that short time!  (The 50 gallon also has corys who eat these 2 items as well.)
 
 
 
 

 

[Lillefishy]

The corys need more bloodworm & other frozen or live food such as brine shrimp, daphnia etc as they're 95% carnivorous, a catfish pellet too as they're not algae eaters