Search results
Results from the WOW.Com Content Network
The refugium light cycle can be operated opposite to the main tank, in order to keep total system pH more stable (due to the uptake of acid-forming CO 2 by photosynthesis occurring in the refugium during its "daylight" hours). One volume guideline for a refugium is 1:10 main tank volume.
The tables below present an example of an artificial seawater (35.00‰ of salinity) preparation devised by Kester, Duedall, Connors and Pytkowicz (1967). [1] The recipe consists of two lists of mineral salts, the first of anhydrous salts that can be weighed out, the second of hydrous salts that should be added to the artificial seawater as a solution.
Perhaps the biggest disincentive to marine fishkeeping, in comparison to freshwater, is the initial setup cost. A 100 US gallons (380 L) reef tank full of coral and equipment can cost in excess of $2,500 US, although a budget-minded home hobbyist could spend less than half of this and still get a satisfactory result.
Evacuation plans cited numbers of at least 25,000 evacuees. The shock waves from the explosion might also affect the tectonically unstable Red Sea Rift located just 450 km away from the blast site. Another danger was increased coastal erosion , because sea currents could change in such a way that even very remote coastal areas would erode.
It may also indicate that Coronation was a refugium that provided a food source for the bear. [3] On both of the outer islands, Baranof and Coronation, there are high levels of endemic mammalian species. This is true of Chichagof, Forrester, and Warren islands as well; all three of which help make up the furthest extent of the Alexander ...
Underwater concrete placement, by Tremie, skip, Pumped concrete, toggle bags, bagwork, usually to build foundations or coastal structures, and [6] grouted aggregate. [ 6 ] [ 7 ] Underwater rock blasting , or dredging of softer sediments, to clear an area of a navigational hazard, to excavate a canal or basin, or to prepare for foundations.
Saltwater aquaponics (also known as marine aquaponics) is a combination of plant cultivation and fish rearing (also called aquaculture), systems with similarities to standard aquaponics, except that it uses saltwater instead of the more commonly used freshwater. In some instances, this may be diluted saltwater.
The Jellyfish Barge is a floating greenhouse module that uses hydroponic agriculture and 70% less water compared to traditional agriculture. The barge is made of recyclable materials and uses solar distillation to collect 150 liters of saltwater daily and turn it into freshwater. 15% seawater is added back into the water to improve the mineral content and nutritional value of the crops.