Feeder Guppies? Okay for community 29 gal?

If they are to be your first fish in an established tank, i say go for it! Feeder Guppies tend to be very hearty fish, just make sure to get all males as they tend to reproduce at a more rapid and effective pace than fancy strain ( believed to be due to inbreeding). They won't get too big so the bio load on your tank will be minimal which will help in cycling the tank and these fish will get along with pretty much anything you throw at it given they are compatible in water parameters or not overly nippers and of course, fish that get large enough to eat them!). I have some feeder guppies i bought that were gorgeous and added them to my community fish and they are very healthy and active. I tend to recommend that if they are to be added after introduction of other fish it is best to quarantine them to make sure they are healthy, as should with any fish to make sure nothing is introduced to a tank that can wipe out all residents! Good luck with your selection and can't beat the price!