Crypts are fairly popular aquarium plants due to their ease. They can grow fairly large, mine are now poking out of the top of my 55 gallon. They are heavy root feeders and thus normally require some sort of substrate addition.
Brown crypt adds nice color contrast and it will spread by underground runners. Plants will also grow larger as they mature.
I also have these in a coldwater tank that sometimes gets down to 65F. They are growing well, but seem to stay lower to the substrate, with almost no stems. Leaves seem to rise directly from the substrate, though they are full sized leaves.
Great plant, pretty easy doing well in my tank, PH a little above 7, and it has sent out a ton of runners, lots of new plants, has stayed pretty small though. I'm starting co2 injection though so hopefully the leaves will start getting larger.
Love this plant, have found it to withstand EVERYTHING. It is immune to neglect and herbivorous fish. I've had mine become overgrown with algae drop all its leaves and sprout new ones. I doesn't need light, it doesn't need any type of supplemental dosing, it always reproduces and it will grow fast when happy. I've kept it with many different kinds of herbivorous cichlid, I've had it get devastated but then bounce back. It doesn't taste good and the fish eventually give up on eating it. Gosh this is just one tough plant.
Bought a clump of this several months ago from our LFS, separated it into a dozen or so individual plants, planted it into several tanks (flora-max substrate, WPG 1.5-2, ph around 7.2, liquid CO2 supplementation) and waited for it to melt. To my delight, NO melting, lots of new growth. Has proven to be a very durable and beautiful plant, despite being moved around quite a bit. Recommend it!
I bought a small one at my LFS, and it has tripled in size in about two months and never melted. I have a dirted tank and use no ferts or CO2. Temp is 79, and pH is nearing 7.6. I really love this plant!