Alabama Water Quality Information System

— Choose a Frequently Asked Question (FAQ) —


	1.-		Are all fish equally susceptible to brown blood disease (nitrite toxicity) problems?


	2.-		Are carbon dioxide problems more likely to occur in shallow or deep fish ponds?


	3.-		Are planktonic cyanobacteria (blue-green algae) desirable in aquaculture ponds?


	4.-		Are there any commercial uses for duckweed?


	5.-		Are there chemical treatments for carbon dioxide removal from intensively managed fish ponds?


	6.-		Can I eat fish from cyanobacteria contaminated water?


	7.-		Can I eat fish or shellfish caught in water with blue-green algae in it?


	8.-		Can lime products be used as chemical treatment to alleviate high carbon dioxide levels in intensively managed fish ponds and are there potential hazards associated with such treatment?


	9.-		Can liming a fish pond to increase pH and total alkalinity create greater potential for ammonia toxicity?


	10.-		Can over-feeding the fish in my ornamental pond result in problems?


	11.-		Can salt additions to farm fish ponds to reduce incidence of brown blood disease (nitrite toxicity) have other health benefits?


	12.-		Can the sudden addition of fish to a water body lead to ammonia toxicity?


	13.-		Do pet fish owners need to be concerned about their water utility changing from chlorine to chloramines for drinking water disinfection?


	14.-		Does salt concentration or salinity of water affect solubility of oxygen?


	15.-		Does the off-flavor taste of pond-raised catfish occur only during warm summer months?


	16.-		How are fish affected by oil spills?


	17.-		How can Secchi disk measurements be used in fish pond management?


	18.-		How do you calculate the amount of salt needed in a fish pond to alleviate a brown blood (nitrite toxicity) problem?


	19.-		How does algae density in a fish pond affect oxygen and carbon dioxide fluctuation?


	20.-		How does the oxidation of ammonia nitrogen (NH3 and NH4+) affect the pH of aquatic systems?


	21.-		How frequently should a fish farm manager check the chloride and nitrite ion concentrations in his pond water for potential brown blood problems?


	22.-		How long does it take a brown blood (nitrite toxicity) problem to dissipate after salt has been added to a fish pond?


	23.-		How long does it take toxic levels of nitrite to build up in an intensively managed fish pond?


	24.-		How long will it take nitrifying bacteria to reach populations capable of oxidizing all the ammonia-ammonium waste products in an aquarium, backyard pool or fish pond that has just been stocked with fish for the first time or refilled with fresh clean water?


	25.-		How much geosmin or 2-methylisoborneol (MIB) residue from blue-green algae growth in pond water does it take to produce an off-flavor taste in catfish?


	26.-		How much would it cost to set up a major offshore seawater fish farming operation in the Gulf of Mexico?


	27.-		How should I fill my small fish aquarium with tap water?


	28.-		How will global warming impact coastal fisheries?


	29.-		How will global warming impact fisheries?


	30.-		I am having too much trouble with green algae in my freshwater aquarium. I was told that I could periodically add some water fleas (Daphnia) and they would reduce the algae growth in just a matter of days. Is this true?

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This website was developed by the ACES Water Quality Team, under the leadership of Dr. James E. Hairston. It is funded, in part, by USDA-CSREES water quality grant support under Section 406 of the Agricultural Research, Extension and Education Reform Act of 1998.