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| You are at: Petting > Freshwater Aquarium Fish Survival Guide |
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| Posted: 2007-01-22; updated: 2010-05-16 | ||
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Freshwater Aquarium Fish Survival Guide
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Why does the fish, that swim happily at the aquarium shop, without obvious reason die immediately or a few days after they reach our house or die one by one in a few weeks until only one fish is left? I have spent significant amount of money for this. I do not want anybody else to repeat the same mistakes. Acclimation (IMPORTANT) When reaching home, we MUST follow this simple procedure to accommodate the fish to the water of the tank. If we do not do this, the fish may die after one week. This is called drip acclimation. Pour water slowly from the plastic bag together with the fish into a pail (about the same volume with the plastic bag). Use aquarium air tube to siphon tank water into the pail. Adjust air flow control valve (buy it if you do not have it yet) at the end of the tube so that water drips instead of flowing. Put a net over the pail to avoid the fish from jumping out. Let the water drip until the pail is full. Finally catch the fish with a fish net and release it into the tank. Pouring the fish into the tank together with the water is not recommended because the water from the fish shop may contain some germs. If the fish are gasping at the water's surface (sign of lacking oxygen) in the process of adding water, stop the procedure and go straight to the final step. Water change (IMPORTANT) My female platy in dropsy Daily partial water change is essential for fish survival even though the tank is crystal clear. The fish at the fish shop looks vibrant due the frequent water change (always replenishing water into the tank after sales of fish). If the water change is not enough, the fish will have dropsy. Dropsy is a disease that makes scales stick out; it cannot be treated but it can be prevented. My female red platy fish got dropsy and died. For example 20 liter (5.3 US gallon) needs about 1 liter of water change daily. The water taken out can be used to wash the hanging power filter (a picture of the filter is shown in freshwater aquarium starter guide) element at the same time (beneficial bacteria on the filter element is preserved if the filter element is washed with water from the tank itself). The brownish / greenish wash water is then used to water potted plant. I add two squirts of dechlorinator to one scoop of tap water (approx 2 liters). Pour new water into the hanging power filter to flow into the tank so that the fish will have less shock and the dirt in the filter can be stirred up / detached from filter wall to be trapped in the filter pad for the next washing. If we are busy then we should change a quarter of the tank weekly, provided the tank has plants. Do not just immerse the scoop in the fish tank because the sudden big addition of new water may cause physical shock to the fish. I did that once and the next morning one Rosy Barb and four Gold Tiger Barbs died. Weekly water change is the minimum. If we cannot even do the weekly water change then we should not keep an aquarium. If we do not change water at least weekly, then the chemical difference between new water and old water will be high during the next change and causes stress in fish when the new water is poured in. Major water change usually is unnecessary if water is partially changed daily and filter element is washed periodically. I do major water change when the substrate needs cleaning, some suds forms on water surface or a fish has died. For major water change, do NOT change all of the water and clean everything. The most is to take out the water until the level that is just enough for the fish to breath without evacuating the fish. Right before changing water I stir the substrate (of course the part that does not have plant). If the tank does not have algae eater, rub off the algae (if any) on the tank walls. Thus some alga cells and dirt can be also removed during the water change. Stirring the substrate is to aerate substrate and to clear away accumulated harmful matters. Filter element should be washed periodically (e.g. once every twice partial water change) or else it will become a pollution factory. The element is washed in the water from the tank so that beneficial bacteria are preserved. When the water level decreases due to evaporation, do not just top up because pollutants are still in the tank. Some water change is still needed. Feeding Feed only one time a day, preferably in the morning. This is another reason that the fish at the shop looks healthy. The shop cannot afford the cost of fish food to feed twice a day. Drop in fish food until the fish do not eagerly chase for the food. After doing this a few days, you will know to estimate the amount to drop in. After the feeding the morning, later in the day if you happen to sit down to watch the fish and you feel like seeing them eating, you can drop in just a very little food. Although the fish should not be overfed, be cautious at the same time that they are not underfed. Watch out the food pellet size based on the fish size. I like to have tiny pellets (less than 1 mm diameter) because they are easier for bigger fish (3 inch) to digest and easier for smaller fish (1 inch) to swallow. If the filter disturbs the feeding (like sucking some food into filter), switch the filter off temporarily. If we go on vacation and nobody helps us feed the fish, then put in a holiday food block. It is even better if we use an automatic food dispenser. If the fish look sick and you are sure that underfeeding is not the reason, then you should even feed the fish only once every two days. Starvation heals, even for humans, dogs and cats. Fish that is neither surface feeder nor bottom feeder (e.g. black-skirt tetra) must not be fed with big pallet because the fish either cannot eat it or tries to swallow it (and has problem later). The food pellet should not contain colorant and other chemicals (such as synthetic compound that is said to enhance the color of fish). To further enhance fish health, provide some wet unprocessed food (frozen bloodworm, live brine shrimp etc) occasionally. If your area has mosquitoes, put a small cup of water outdoor. When mosquito larvae are visible, pour the water into the tank. The fish will be happy to have this treat. Wash the cup and repeat the same thing. Water to put into tank Plants If we want to have a lot of aquarium plants, we should ensure there is water movement (produced by air pump or filter) in the tank to promote air exchange when the aquarium light is not turned on. When there is no light plants also consume oxygen. Quarantine plants from lake or river for a few days (I take 2 days) in mild saltwater before putting them into the tank as the plant may have some harmful bacteria or chemical. The plant may also have snail's eggs that may hatch and infest the tank. For plants bought from the shop, we should also quarantine them for one night to clear off excessive fertilizer before planting them in the aquarium. Do not put Devil's Ivy (Epipremnum aureum) into the tank. This plant is poisonous and will slowly kill all the fish (none of my guppies survived, painful). Companionship from the same species Trace elements (invertebrates only) Others Stocking a fish tank is the fun part of the hobby but please let a new tank stabilizes itself first with the equipment switched on for a few days before adding fish. People commonly make this mistake by adding fish too early. Add at most three hardy fish (e.g. Black-skirt Tetra) first. Then add more after a week. All fish like cave. Put in a short opaque channel or pipe that is just big enough for fish to swim through. Some fish will rest in there. If there is enough hiding place within the plants, then a cave may not be needed. Do not let the shopkeeper choose the fish for us. Avoid fish that has injury (torn fin, missing scale etc). If we want to add more than one type of fish in our tank, observe compatibility at the fish shop itself. When we see an interesting fish but we do not know yet the compatibility with our existing tank inhabitant, then do not buy it first. I did not know puffer fish would harm eat snail and shrimp when I bought it. After stocking a tank for a few days observe closely if there is any bite injury on any fish. If yes, isolate the fish with an aquarium divider to avoid casualty. Do not overcrowd the tank. If the fish are gasping at the water's surface, it is a sign that there is not enough oxygen in water for the number of fish in the tank. My own reference for fish number estimation is the tank bottom available area. I ask myself this question: "Is there enough area for every fish to sleep?" Add new fish only when there is no dying fish or other problem for a significant period of time (e.g. a fortnight). Add one type only at a time so that we can observe compatibility. The fish needs at least a few hours of light a day to stay healthy. Chloride in the salt neutralizes nitrite that appears especially in new tank. Salt also helps fish that have scales build their protective slime layer. But fish without scale or baby fish cannot tolerate salt. If water change is maintained, nitrite and disease will not be an issue so it is NOT necessary to add salt. Salt should be used only to treat ich. To treat ich, try not to use table salt because it may contain unnatural additives undesirable to fish. Buy salt from aquarium shop. Do not spray insecticide at home. Insecticide advertisements recommend us to spray insecticide to kill mosquitoes. But that is misleading information. Not only the fish will die, our health will be affected too. For goldfish Fish with sucker mouth (e.g. pleco) will suck on goldfish. It may harm goldfish physically. And the goldfish will be under stress. Stress kills. So do not keep them together. Nitrogen cycle If many fish are added into a clean tank, the ammonia spike (relative to its previous clean non-ammonia state) will kill the pioneers.
If the ammonia is very severe, red streaks and spots on the fins and tail, and even black marks on the tips of the fins and tail which are ammonia burns, can be seen.
Some of the fish in the tank may die immediately, but even after the problem is taken care of, damage to internal organs may kill some fish weeks later.
For this one, prevention is better than cure. Again: Avoid using canned nitrifying bacteria as they may not be the same with the ones around our place and when they die there will be no natural reinforcement. On what basis do the manufacturers formulate the bacteria? |
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Petting: Other Articles Algae On Freshwater Aquarium Walls Freshwater Aquarium Fish Compatibility Freshwater Aquarium Starter Guide Keeping Budgerigars When Freshwater Aquarium Looks Cloudy White Spot On Freshwater Aquarium Fish (Other categories are accessible from homepage) |
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