Once the water temperature of our cold water fish’s home is consistently below 12 to 15 degrees Celsius their digestive systems virtually stop and they are not able to digest the high protein summer foods as effectively as they do during the warmer months.
They may however still feel “hungry” and will eat but the enzymes needed for digestion are lacking. This is why we offer them foods which are easily and quickly digestible and which contain minimal residue which could stall the gut and cause the food to decay in their systems.
When and how much should we feed during the colder months ?
><> When the water temperature is consistently below 5⁰C please stop feeding.
><> Once the water temperature is consistently above 5⁰C but below 12⁰C we can feed wheatgerm foods (their digestive system shuts down at this temperature).
As a general rule, f they are not coming up to the surface to feed please skip the meal!
><> When the water temperature is consistently above 13⁰C we can start feeding animal-protein rich foods again for growth during summer (when their digestive system resumes normal function).
VERY IMPORTANT FEEDING GUIDELINES FOR ALL YEAR ROUND
Please do not exceed the amount your fish will eat within 2 to 3 minutes of feeding. Remove all uneaten food after the feeding time period to avoid over-feeding and the water quality problems which excess food can cause.
Note: During any appetite loss, after sickness or during medicating, your fish’s eating habits may be significantly reduced. Carefully monitor the amount of food you feed to avoid problems during these times.
What is wheatgerm ?
Wheatgerm is the name given to a small part of the wheat seed. It is the part of the seed that germinates (hence the name) and allows the wheat plant to start growing. It is surrounded by the rest of the seed which provides a large food source. To utilize this food, the wheatgerm has to be rich in certain vitamins, minerals, essential fatty acids and proteins.
What are the benefits of wheatgerm ?
The rich and concentrated nutrients contained within wheatgerm have a number of benefits; Vitamin E (protects cell membranes, allows effective use of fats and improves overall health and vigor, also important for the development of reproductive organs and therefore benefits fertility in spring), Vitamin C (essential for the efficient use of other nutrients and for skeletal formation, in combination with vitamin E it helps to overcome problems associated with stress), Fatty Acids (formation of cell walls and improves the digestion of other nutrients as a storable energy source and is particularly rich in linoleic acid which is essential for tissue repair), Amino Acids (contains Lysine, an important component of the diet to allow tissue repair and formation as well as promoting the immune system).
Winter foods vary considerably in the amount of wheatgerm they contain. It is an expensive component of the food as only 5% of the wheat seed is the germ and the rest is discarded. Some of the less expensive “wheatgerm” foods contain as little as 5% wheatgerm whereas a high quality wheatgerm food contains more than six times this quantity.
During the warm summer months we may have a spike in temperature in our aquarium and the consequences could be devastating.
Thermometers should always be used for every aquarium, regardless of its size. Rapid, significant and frequent temperature changes throughout the day are stressful for fish and the preferred range for the beneficial bacteria in your aquarium is 18-29°C, at 35°C these bacteria may die which can lead to ammonia spikes. A thermometer will also ensure a faulty heater is discovered timeously.
Most species require higher temperatures for breeding and this can lead to unnecessary aggression between tankmates, especially with malawis and other cichlids.
Warm water speeds up the metabolism of your fish causing your fish to become more active and require more oxygen.
Warm water holds less dissolved oxygen than cooler water and is a vital consideration!
Fish will initially react to lower oxygen levels by simply moving around less; swim less, even eat less. As oxygen levels drop further, the fish begin to show labored breathing and more rapid gill movement as they as they try to get more oxygen from the water by passing more water through their gills. Eventually this can lead to possible gasping at the surface of the water (this is not be confused with fish feeding at the surface or fish that can normally take some air at the surface, such as labyrinth fish like bettas and gouramis).
Live plants use oxygen when not exposed to light, invertebrates, molluscs and even algae consumes oxygen. The beneficial bacteria in your aquarium need oxygen to break down ammonia and with reduced oxygen levels the ammonia in your tank can build up, displacing oxygen and could cause burning of your fish’s gills.
It can’t hurt to increase your aeration to assure proper levels of oxygen. The surface of your aquarium is always in contact with the air and oxygen enters the water through a process known as gas exchange (the water in your aquarium exchanges carbon dioxide (CO2) for the oxygen (O2) in the air). The method used to “artificially” increase the surface area of your aquarium is called surface agitation; water movement on the surface of your aquarium increases the surface area and this allows more oxygen to dissolve and more carbon dioxide to escape. You can use an airstone, hang-on filter, powerhead, wavemaker, spray bar, lily pipe or by pointing your filter return at the surface.
You can also do water changes more often. Use water that is a degree or two cooler than your aquarium water, this keeps the water temperature down and maintains adequate oxygen levels for your fish.
If possible keep the aquarium lights turned off, make sure the room does not receive direct sunlight and remove the canopy (use caution if your fish are jumpers and keep an eye on the cats). A fan can be placed so that it blows directly across the water or float ice packs or frozen bottles in the water.
Powdered and Liquid Oxygen immediately adds oxygen to your aquarium water and improves the living conditions. A good supply of oxygen makes the decomposition process more effective and as a result the aquarium remains clear and odor free.
Water can only hold so much oxygen before it reaches saturation so no need to worry about too much oxygen. Once saturation is achieved no more oxygen can dissolve in the water. Your fish will happily breathe in water that is saturated with oxygen – it’s harmless.
ANTI-PARASITIC TREATMENT KIT
As the warm weather returns so we can expect an influx of various parasites, bacterial diseases and infections due to the pond water rising in temperature. Over the years we have been in various discussions with Koi experts and vets and the consensus is that these diseases and infections are on the rise in South Africa and could be fatal to your entire collection.
The three main transmitting factors are air, water and birds. We are not able to control the air born and bird aspects but what we can offer is our tried and tested Spring Treatment.
It is extremely important to conduct spring treatments as this eradicates all the parasites that cause those problems e.g. ulcers etc. This keeps your koi in pristine condition during summer with no outbreaks of disease (PREVENTION IS BETTER THAN CURE!).
Day 1 Fluke Away added to water to eradicate skin and gill flukes
Day 3 Malachite Green and Formalin to eradicate all other parasites
Day 5 Fluke Away to eradicate eggs from skin and gill flukes
Day 7 Malachite Green to ensure that Day 3 treatment has eliminated all parasites and their eggs
Day 8 Backwash / Water change of 20%
Day 10 30% water change and add Pristine to re-seed the filter
Please note … If you have goldfish in your pond we would NOT suggest the spring treatment. The Fluke Away may kill them.
Acriflavin & Salt (3% – 3kg per 1000L) is a good alternative Treatment for goldfish ponds.
Pristine is a non-toxic, non-pathogenic, bio-friendly pond treatment of beneficial bacteria for both the filters as well as the immune system of your koi. It re-seeds the biological filter as well as reducing ammonia and nitrogen levels.