What causes stunted shell growth?

[Katie]

other than genetics, what causes stunted shells, and slow growth?

to crowded habitat? (is this one?)

lack of calcium? (i guess that is one)

what else?

[Rachel]

lack of calcium, overcrowding, tank to small, mites, illness, insufficient vitamins and minerals i would presume also, i think if the tanks at the wrong temp or to dry it might affect that as well.

[vikingsnail]

I'd say mites were the cause of my fulica's stunted growth - there's a big dip in his shell from where he chewed on his shell when he had them a while back, and the new growth since then has been slow and rough

[Katie]

thats what humbug shell is like, kindof rusty where the new growth should be, but he isn't growing anymore, he stopped at about 4 cm.

[vikingsnail]

Yeah, my fulica is around 4 - 5cm and hasn't grown much lately - hopefully he'll continue to grow though