Mine is kept in Ph 7, with normal Freshwater conditions.... Had mine for 18 months or so, he is a pretty big boy, originally in freshwater tank with Pictus, Id's but started eating Ciclids and trying to catch anything that moved past him so off to his own home he went...
I would not keep a male cray of this variety with anything as they get so aggressive but love my guy to bits he is a real character and extremely entertaining....
My guy loves to eat bloodworm, peas (processed are better) chicken (he loves it) and cray/crab food.... They are very messy eaters and tank hoovering is essential as they get grotty very quickly....