Viresco Professional 2.5g & Free Nitrate Test Strips
Viresco aquatic products for all your pond needs …
For clean, clear water, healthier fish and more abundant wildlife nothing works as effectively and economically as Viresco. It uses a combination of different micro-organisms that clean water by removing the soluble nutrients on which algae feeds and digest the organic matter that makes ponds cloudy. One application can last many months and as a non-chemical product it is completely harmless to wild birds, fish, frogs, newts, pets, plants, insects and humans.
Most koi keepers keep very clean ponds and do not have a need for the organic waste digester part of Viresco Aqua. Therefore, we introduced Viresco Professional, this is more concentrated than Viresco Aqua and contains more of the nitrate removing microbes, resulting in healthier fish as well as little or no weed. 2.5g pack will treat approx. 6,500 litres (1,500 gallons) of pondwater.
All Viresco products are:
• Non-chemical – totally biological
• Easy to use with a long shelf life
• Long lasting – one application lasts many months
• Harmless to fish, plants and wildlife, even if overdosed
• Full instructions with every pack!
Viresco Professional is available in 2.5g, 5g, 10g and 25g packs, please see individual ordering details for all sizes below.
FREE! Nitrate Test Strips - worth £3.95!
Includes 3 nitrate test strips for use before, during and after testing of your water.
Please note: Product supplied in a sachet.
How much do I need?
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Viresco Professional 2.5g & Free Nitrate Test Strips
2.5g Small Pond Pack (treats 6,500 litres)
FREE Nitrate Test Kit
Last Order Date:
Despatch: Within 5-7 days
What are the benefits of Viresco Professional?
Viresco Professional gives two main benefits to the pond keeper. It removes nitrate and reduces phosphate that feed algae in pond water. As a result, blanketweed (string algae) and algae bloom (green water) die of starvation. Secondly, it will improve the health, growth and disease resistance of fish.
How long does it take to work?
In warmer weather, many people see blanketweed dying back within 7 to 10 days. For most people it occurs within about 4 weeks but for some it takes longer. If, after this time, no noticeable change in the nitrate level has taken place, then apply a second dose.
Will it affect my fish or other wildlife in my pond?
All Viresco products are safe for fish. Our key product was initially formulated for use on commercial fish farms to improve the growth, health and disease resistance of the fish. The fact that it suppressed algae growth by removing the nutrients on which algae feed turned out to be a bonus. Fish eat better and grow quicker. They are less prone to fungal and bacterial diseases. Many of our customers have referred to their fish becoming “more lively”. The only proviso is that there is plenty of oxygen present in the water. There is also no problem for other wildlife, e.g. newts and frogs. Additionally, Viresco does no harm to plants. However, because it reduces nitrate levels in the water, plants may grow less strongly. For example, leaves of, say, water lilies grow less vigorously but the bonus is that they should flower better.
What about other chemicals?
Any chemical that knocks back the microbes in a filter system will also knock back the microbes in our Viresco products. Wait for around 10 days until these chemicals have dissipated. Be careful if you have recently used salt - any more than half an ounce per gallon may affect the microbes. You should also be aware that Viresco Professional works more slowly in high pH water.
Can it be overdosed?
Viresco Professional can be overdosed with no problem. It is organic not a chemical. We have one customer who each year uses 6 times our recommended dose all at once and for three years has not seen any blanketweed. The only qualification is that enough oxygen should be present.
What differences do fish stocking and overfeeding make?
The more fish you have, and the bigger the fish, the more waste (ammonia) they produce. Ammonia eventually converts to nitrate which feeds algae. Year on year, fish can increase appreciably in weight. Also, where overfeeding occurs or when very high protein foods are used, more ammonia is produced. More ammonia means more nitrite and more nitrate therefore more food for the algae. If you think you are overstocked, or overfeeding, double the recommended dosage.
How long will it keep?
Viresco Professional has an unlimited shelf life as long as it is kept dry. We recommend that you seal the pack and keep somewhere dry and cool such as a shelf in a shed or garage.
Viresco Professional was formulated for use by pondkeepers who keep very clean ponds by using bottom drains, vacuums and skimmers. There are two separate groups of micro-organisms in Viresco Professional, nitrate-reducing and waste-digesting, but the number of the latter is small. The microbes reduce the soluble nutrient level in the water. Blanketweed and algal blooms are rapidly suppressed as they no longer have a food supply.
Rate of use
The amount of Viresco Professional required for ponds is about 10g per 6000 gallons (27,000 litres) of water. To calculate the volume of water in your pond multiply the length in feet by the width by the average depth then multiply by 6.23. This will give volume in gallons. If your pond is round or oval, just “square it off” and use the approximate measurements. 1 gram of Professional will treat 600 gallons, so divide your pack into the required number of portions. You do not need to be exact; just cut the powder on a sheet of paper with a knife.
Method of use
Viresco Professional powder should be added to between half a bucket and a bucketful of pond water and dissolved. Once the powder is in solution, it should be aerated by whisking, stirring with a stick or using an air stone. Leave for a few hours inside a garage or house away from direct light. Pour the solution into the pond at points all around. Reseal any remaining product and store in a dry, cool place. The microbes in the powder have many years shelf life if kept dry.
The importance of oxygen
Viresco Professional is harmless to fish and plants and you can use more than the recommended dose. However, it is important to have enough oxygen in the water when it is used as it contains aerobic micro-organisms. Pumps, oxygenating plants, waterfalls and fountains are all good oxygenators. If it is used in a pond without sufficient oxygen, its effectiveness is reduced. It could also deprive fish of oxygen. If there is any doubt about the oxygen levels, start with a reduced application and watch the fish carefully. Then continue to add the full amount over a few days. If the fish move to the surface, they are not receiving enough oxygen and aeration will be required immediately. Remember, in hot weather, water does not hold as much oxygen as in cold weather.
Quantity to use and frequency of use
Our recommended rate of use is normally enough to clear blanket weed in one application. However, there are times when further doses may be required. These usually relate to overstocking or overfeeding of fish. It is recommended that nitrate tests are done when Viresco Professional is used. Do a test immediately before it is applied and repeat weekly. This should show that the nitrate level is dropping and the microbes in the product are working. If little change is seen in the blanketweed within about 3 weeks then a second application is recommended. When the blanketweed has disappeared, it makes sense to add top-up amounts of Viresco Professional. This could be say one third or one quarter rate every 3 or 4 weeks.
VIRESCO PROFESSIONAL IS NOT A CHEMICAL. IT IS A BIOLOGICAL PRODUCT CONTAINING MICRO-ORGANISMS.
VIRESCO PROFESSIONAL IS HARMLESS TO FISH, PETS, BIRDS, PEOPLE AND PLANTS.
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