Lake and pond conditioning products by drydenaqua


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Aquaculture, Water & Wastewater Treatment

Environmental & sustainable water treatment to save the planet

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before	Lake & Pond Conditioning, a holistic approach to Aquatic Habitat Management Sizing Systems		after
Over view		Dulwich Park London
Natural habitats, lakes and ponds are coming under increasing pressure from the public for amenity and recreational value. In case where the system are new, the biology will need help in order to become established. In more mature systems, the ability of the ecosystem to cope with the demands placed upon the ecology of the water body can be too great for the system to self sustain. These systems all need help, but this help should be carefully balanced to provide the greatest benefit for the least amount of effort, with the system focused on helping nature to support the extra demands. The net results are an un-obtrusive system, greatly improved water quality, better environment for the aquatic organisms, and much better aesthetic and amenity value for the public.
How is this achieved
There are three levels to lake and pond conditioning Aeration, oxygenation and water mixing ....using aeration or in extreme cases pure oxygenation Bio-augmentation....by the use of natural bacteria NoPhos.....used to eliminate the phosphate

Table 1 Sizing a system
.	stage 1	stage 2	stage 3
Size of lake 1 x acre = approx. 4057 square metres, water depth less than 2 metres average	Aeration cubm/air/hr	Bio-Augmentation Pond Clarity Pro in Kg required in first year	NoPhos phosphate control Kg per month
1/10 Acre	10	1 to 2	0.5
1/4 Acre	15	2 to 5	1
1/3 Acre	25	3 to 7	1.5
1/2 Acre	25	5 to 10	2
3/4 Acre	40	7 to 15	3
1 Acre	40	10 to 20	4
Go to price section of on-line web store to place an order or view the price details.	price	price	price

How to use the table above
If you know the size of your lake or pond then the number of biofiltration, bioaugmentation and level of aeration required. However all lakes and ponds are different, and some may require more or less treatment and support. Follow the section below to calculate the level of treatment that your lake, pond or fishery requires. Please note that the information presented in this section is based on knowledge and experience, however however it should still be treated as a guideline.
Level of Treatment
From the above guidance table, the size of a system can be established, however not all lakes and ponds are the same, and in many cases the demands placed on the system can range from minor to major. If the lake is only in need to gentle support, then stage 1 AquaMats from Table 1 above will be all that is required. If you find that this is not sufficient to achieve the desired results, then stage 2 bio-augmentation then stage 3 aeration can be introduced in succession. If the the lake is in quite serious trouble then stage 1, 2 and 3 of Table 1 will be applied, and then an application factor will be used. For example in some cases lakes may receive second use water from effluent treatment systems, or run off from roads or industrial sites. This water can be polluted with ammonium, phosphates and nitrates etc to high levels. These system therefore require extra help provided by increasing the degree of support and treatment, this is achieved by using an application factor.

Table 2. Application Factor
	Lake or pond condition	Application factor, multiply the figures in Table 1 by the values below
Level 1	Fishery & extensive system, that may occasionally suffer from algal blooms, reduced water quality, no fish kills. Limited degree of thermal stratification	(stage 1) x 0.25
Level 2	Fisheries and extensive system, suffers from algal blooms most summers and experience fish kills through algae, and oxygen depletion. The water body is likely to be sheltered from wind induced mixing and suffers from thermal stratification.	(stage 1 & 2) x 0.5
Level 3	Habitat support, the lake is in reasonable condition, but it may suffer from algal blooms, floating weed, coloured or cloudy water, and low fish and or aquatic animal species diversity	(stage 1, 2 & 3) x 0.5
Level 4	Habitat support and water treatment. The lake is under extreme pressure, the water is coloured, cloudy, there may be floating blanket weeds. The water may smell, there will be no fish or a very low population density of fish. Low invertebrate species diversity. You may observe bubbles of gas coming to the surface, especially on warm calm days	(stage 1, 2 & 3) x 1
Level 5	Water Treatment, the lake is very poor condition. It is unlikely there are any fish or higher vertebrates. The water is coloured, there are algal blooms, gas bubbling to surface of water, possibly a nasty smell. Poor species diversity, very few in invertebrate organisms such as nymphs or daphnia. There may be high levels of nematode worms in sediment. The water my be a public and/or environmental health hazard. If the water is black and completely anoxic, pure oxygen addition may be required for emergency remediation during the first stage of lake recovery,	(stage 1, 2, 3) x 2 +

How to Use application factor
If we take a 1/10 acre lake that is in reasonable condition, the application factor will be Level 3. Multiply all of the figures in Table 1 by 0.5 to give the following;

Size of lake	NoPhos phosphate control Kg per month	Bio-Augmentation Pond Clarity Pro Kg per year	Aeration cubm/air/hr
1/10 Acre	0.25 kg	0.5 to 1 kg	5 to 10

The application factors and sizing of the the lake remedeation equipment, assumes that the average depth of the the lake does not exceed 2metres. If the lake is of greater depth, the application factor will be increased in proportion. For example if the lake has an average depth of 4 metres, then you should double the application factor value.

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