08-31-2009, 01:47 PM
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Kribs are great fish. I used to own a couple and they were brilliant.
They are alright in pH 6.5 - 7.5 so you should be just about ok on that front, though it would be best to go slightly more acidic.
Water conditions aren't QUITE as important as t may seem. I don't own any testing kits, thermometers or any of that gubbins and I have been keeping cichlids for over 5 years. In fact, my Jack Dempsies were the first fish I bought and I still have them today. Very healthy. My Firemouth and Texas cichlids are also very healthy and happy.
Sexing kribensis is very easy too, so getting a pair isn't even slightly a problem. Harder when young, but the pointed dorsal fin is a dead giveaway.
Beautiful fish, great parents. Only grow to 3-4 inches so you'll easily get a pair in your 30 gallon.
Others to consider are Rams (sometimes known as Dwarf Cichlids) as they are small and well natured to cichlids.