BUDIDAYA PERIKANAN |
| Posted: 05 Apr 2010 06:49 AM PDT
The operations of fish hatcheries are now in great demand because the rate of turnover of people on this seeding business relatively quickly, unlike the fish rearing business or the provision of fisheries infrastructure and facilities such as tools, equipment and feed. This seeding business has now become a sub-system of its own efforts in the field of aquaculture. Business Activity seeding takes place in a relatively short time is 1 - 3 months only. With a relatively short time is the venture capital invested will be faster again, and so the profits stay seeding. This hatchery operations will absorb many labor, which will then provide opportunities to accelerate development of aquaculture industry. In the aquaculture activities, the activities of this hatchery is the main activity and may be regarded as a key to the success of other activities. If the seeding operations are not running the other farming activities will not run. budidaya ikan   |
| How Pond Aeration Can Reduce Pond Weeds Posted: 04 Apr 2010 08:28 AM PDT
by: Sue McCrossin Around the United States and other countries in the last few years, a great number of new housing developments have sprung up to house the ever-increasing population. These developments increase the amount of nutrients and sediments that wash into watersheds. Fertilizer, improper waste disposal, and soil run-off find their way into our streams, lakes and ponds and cause the following problems: algae blooms, rooted pond weeds, bacteria, low oxygen levels, increased water temperature, nasty odors, and fish kills. A normal healthy pond keeps itself clean because it contains an ecosystem with a food chain of organisms that absorb nutrients. At the lowest part of the pond food chain, aerobic bacteria eat nutrients. The natural system in the pond works very well until excessive nutrients and run-off overwhelms the pond's ecosystem and its ability to absorb nutrients. Once this occurs algae and pond weeds take over. As algae and pond weeds die, sink to the bottom and rot, they add nutrients back into the water, use up the oxygen at the bottom of the pond, and increase the bottom sediment. Then, as soon as sunlight and water temperature are right again, a new algae bloom and pond weed growth occur. The Wrong Solution to Pond Weeds Typically to combat this cycle pond owners add chemicals and herbicides to kill pond weeds quickly. Unfortunately this only acerbates the problem by adding more muck from dead vegetation to the bottom of the pond. The decaying plant material further depletes the oxygen levels. Extensive chemical usage can also result in residual build up in the sediments and fish. The Right Solution to Pond Weeds The solution is to increase dissolved oxygen levels so that nutrients decompose aerobically. The bacteria and organisms that live in the pond need dissolved oxygen to decompose the organic sediments, and die off if the dissolved oxygen level decreases. A different type of bacteria, anaerobic bacteria, thrive in the environment when there is low or no dissolved oxygen, and these bacteria slowly digest the organic sediments and release toxic gases into the water that kill beneficial aerobic bacteria and insects. Anaerobic digestion of pond sediments is 30-40 times slower than with aerobic digestion, allowing organic sediments levels to increase. The ideal thing to do to save the pond, get rid of pond weeds and algae, and increase pond fish, is to stop the new nutrients from entering the pond. Since this is not always possible, the next best thing to do is to add dissolved oxygen to the pond, which will improve water quality, allowing aerobic bacteria to decompose organic matter. This process is called Pond Aeration. Pond Aeration – The Solution Pond aeration increases the process of oxidizing or eliminating pollution. The best pond aeration systems work by using special equipment called diffusers. Maintaining the aerobic environment will also reduce or prevent the accumulation of organic sediments. Aerobic conditions at the pond bottom benefit all aspects of the aquatic environment, reduce algae and pond weeds, and prevent sediment build up. About The Author Sue McCrossin is a freelance writer working with CLEAN-FLO to inform people about pond weeds and the process of pond aeration. For more information about pond aeration visit our site today! budidaya ikan   |
| Posted: 04 Apr 2010 07:37 AM PDT
by: Brett Fogle Doing a full pond cleaning during the colder winter months can be very stressful on your fish. However, if the pond is really dirty and full of 'muck' - then you may want to consider it because all of the decaying organic matter in the pond can cause problems if the pond ices over, and this begins to de-gas and rot. So, I think the best solution, and what we used to do for our clients was do a partial Fall pond cleaning. Here's how to do it: First, get a container that will hold roughly 100 gallons or so, or up to half of your pond volume (bigger is better). Then take a pump with a hose, and pump out the relativel 'clean' water from your pond by holding the pump just beneath the water surface. Keep as much of the 'old' pond water as you can. Then, catch your fish (if possible) and place them into the holding tank of their own (clean) water. Then you can either net out your leaves and dispose of them, along with any muck that you can get out also. Alternatively, you can then pump out the remaining water and do a thorough clean out, including vacuuming out the pond with a large wet/dry vac (this works great!). Then refill the pond back up to the level it was at before disposing of the water, de-chlorinate the water, and adjust the pH to match that of the 'old' water in your holding tank. At this point, start pumping new water from the pond into your holding tub, and then pumping the mixture back into the pond. Do this for 15-20 minutes until the new water mixture matches that in the pond - and then pump the remaining water back into your pond while netting your fish back in as well. But it's very important not to expose your fish to new water conditions too quickly as differences in temperature and pH can cause extreme stress to your fish, affect the immune system, and even cause shock or fish death. So always be careful when changing water. About The Author Brett Fogle is the owner of several pond-related websites like http://www.MacArthurWatergardens.com and two others including http://www.Pond-Filters-Online.com and http://4-pond-pumps.com. He also publishes a free monthly newsletter called PondStuff! with a reader circulation of over 9,000. Sign up for the FREE newsletter and receive our complimentary New Pond Owners Guide! brett@macarthurwatergardens.com budidaya ikan   |
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