Museum, water park
Creation, design of adequate filtration system for large pond of water (freshwater and seawater), whatever the size of basin
Mechanical filter: it will retain large particles. Prefer bubble foam open to the wadding which is too compact. * Biological filter: transforms, under the action of aerobic bacteria, certain toxic nitrogen products (ammonium, ammonia, nitrites) into less toxic products (nitrates). It will consist of coral sand or oyster shells placed away from light, bacteria will easily settle. It is in the external form but also inside, it is the choice ... The submerged pump allows the water is always moving, timers can reproduce the current changes, movement to which marine animals are accustomed. By protecting the entrance with a sponge, you will avoid the aspiration of small animals. * Chemical filter: has the effect of taking certain chemical substances including dyes. It is essentially active activated carbon that must be changed every 2 weeks because it reaches saturation and can become toxic. * Skimmer: eliminates harmful colloidal material, waste containing protein. A bubbler sends air into a column that must be cleaned once or twice a week. The water molecules are strongly agitated, releasing toxic products in the form of scum recovered on the surface in a cup. The blackish juice recovered must be discarded. It is the same action that occurs at the seaside when the tide goes up. The bubbler can be replaced in modern skimmers by a water pump but the principle is identical. Skimmers reduce pollution, they must be cleaned regularly so that the waste does not return to the aquarium. However, they also skim the necessary elements such as calcium for example. * UV filter: essential in seawater. It will remove the germs present in the water and avoid their excessive proliferation. Refer to UV filtration in freshwater. * Ozone: is a particular form of oxygen (O3), it is a very aggressive substance that must not enter the ambient air. Ozone has a very oxidizing and germicidal effect, which is why it is used to remove organic substances and disinfect water. But we often forget that ozone also kills useful bacteria. The treatment of problems with ozone only attacks the symptoms but not the causes. So the real maintenance problems are masked. This is why its use is sobering, especially since once dissolved in water, it can be detrimental to invertebrates. * Denitrator: transforms nitrates into nitrogen gas. It addresses the problems caused by the decomposition of nitrates, which are harmful to invertebrates and which also promotes the appearance of bad algae. * Drip: The only really valid method to avoid nitrate buildup is drip. A marine aquarium requires a monthly water change of 15%. A partial, more regular change allows a normalization of the pH and the reduction of salts in solution such as nitrates. A permanent water change is ideal, the drip technique is not very complicated. It is sufficient to have a tank installed above the tank and which flows slowly by the principle of communicating vessels. The overflow will end up in another tank lower than the tank.