I used to breed them and yes to grow them to that perfect round shape you need pretty clean water. Although I have found as of late if you buy captive bred (lots of people doing it now) they are much hardier and accustomed to our water conditions. In a 120gallon tank you wouldnt need to do near the WCs either.
If you ever get a chance stop in at Gold's in Calgary, Dennis has some nice ones over his counter and some rare breeding pairs in the back. I think I seen some Highfin Turquoise and Albino Snake Skins when I was in there Boxing Day.
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Ryan
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