News features and technical articles about the evolution of aquaculture, one of the world’s fastest growing industries.

alkalinity

Health & Welfare

Phytoplankton and its impact on water quality

Phytoplankton has several important effects on water quality, including removing ammonia nitrogen from water and absorbing nutrients from the water for its growth. Abundance of blue-green algae tends to increase as nutrient inputs in aquafeeds or fertilizers increase. 

Health & Welfare

Lime plays crucial role in aquaculture pond management

Agricultural limestone is widely used to improve pH and alkalinity in aquaculture ponds. There is considerable use of lime in aquaculture to disinfect pond bottoms and water, to attempt to control pH, and various other reasons. 

Health & Welfare

The oft-overlooked water quality parameter: pH

Attention to pH, a numeric scale used to specify the acid or alkaline condition of an aqueous solution, is very important. Reducing biomass and feeding rates together with phytoplankton control and liming can often keep pH at desirable values. 

Responsibility

The importance of liming materials in aquaculture

Liming is an important management tool for preparing aquaculture ponds between and during production cycles. Several products are sometimes used in aquaculture for liming production ponds, including agricultural limestone, calcium silicate (CaSiO3) and sodium bicarbonate (NaHCO3). 

Responsibility

The importance of water analysis in aquaculture

Proper monitoring of water quality in aquaculture production systems is critical to enable appropriate and timely management decisions. It requires reliable equipment, trained technicians that follow instructions and apply quality control measures, proper reagents and calibrated equipment, and appropriately collected 

Innovation & Investment

Recirculating aquaculture technology, part 2

To start a biofilter together with a source of nitrifying bacteria, you must provide the conditions that will encourage the growth of the bacteria. The basic process requires initial preparation of water chemistry, adjustment of alkalinity to support bacterial growth 

Health & Welfare

Manage pH cycles to maintain animal health

The ideal pH for most aquaculture species is between 6.0 and 8.5. Lower pH values may result in decreased growth and survival, and greater susceptibility to disease. pH typically is lowest in the early morning, increases during the afternoon and