tanker3 wrote: One is very soft and acid, the other very hard and alkaline.
Not really making any statement on how suitable GD's and TB's would be as tank mates for Kyoga flamebacks, but this statement is defintiely false. And it perpetuates the myth of most African cichlids coming from really unusual water parameters. Nothing could be farther from the truth.
Searched through academic papers and all say that the water chemistry of Lake Kyoga is very similar to lake Victoria.
Lake Victoria:
http://malawicichlids.com/mw01011.htm electrical conductivity of 91-145 microseimens. dGH: 1-4. In what world could that ever be considered "very hard water"? It's softer water then some so called soft water SA cichlids come from!
Some pH measurements from lake Kyoga.
http://wldb.ilec.or.jp/data/databook_html/afr/afr-15.html pH 7.1, pH 7.4, pH 7.6. Nothing excessively alkaline.
Water parameters taken for lake Kyoga showing very similar to lake Victoria.
http://www.fao.org/docrep/005/T0473E/T0473E11.htm electrical conductivity of 90-200 microseimens and calcium and magnesium that equates to a dGH of 2. Nothing at all that could be described as "very hard'!
There is no doubt that both giant danios and tiger barbs are typically found in much harder water, and even sometimes, similar pH. Yet, time and time again such a big deal is made of the water that African cichlids come from.