In North Dakota's Bakken formation, the break-even cost has fallen into the $20s in some counties, the state's Department of Mineral Resources reported last month. Producing a barrel of oil would still be profitable at $24 in Dunn County, down from $29 last October.
You can exclude this risk. Water temperatures and influence on fish behaviour Normal temperatures for keeping discus fish lie at 29-30 Â°C. If your fish are too calm and do not eat greedily but are hesitant about eating, raise the water temperature for c. two weeks to 33 Â°C. This will raise the metabolic rate of the discus fish and encourage their appetite and their sense of hunger.
The ideal pH for discus is around 6.5. If your pH is over 7 or below 6 it may begin to cause discus stress. Tank bred Discus species have been known to thrive in pH as high as 7.8 as long as there is little/no fluctuation. Relative water hardness should be 1dH - 8dH.