Bloodworms are larvae which "hatch" into fly's.
If you want to do something like this, try tubiflex worms. But I think a grain size larger would be better. Sand might be good for the bloodworms I really couldn't say but last
time I had the tubiflex I had this gravel.
http://www.plantedtank.net/forums/picture.php?albumid=14281&pictureid=52570
http://www.lfscultures.com/cultures.html
And think putting something like these in there before the fish so they can establish themselves is a good idea, but don't forget to feed them. If there are no fish...then
there is no fish waste if that's what they eat. You might even wait till there are some plants growing also before putting in the worms.
If you want to do something like this, try tubiflex worms. But I think a grain size larger would be better. Sand might be good for the bloodworms I really couldn't say but last
time I had the tubiflex I had this gravel.
http://www.plantedtank.net/forums/picture.php?albumid=14281&pictureid=52570
http://www.lfscultures.com/cultures.html
And think putting something like these in there before the fish so they can establish themselves is a good idea, but don't forget to feed them. If there are no fish...then
there is no fish waste if that's what they eat. You might even wait till there are some plants growing also before putting in the worms.