Water Treatments
Pond care products are designed to enhance water quality and enable you to admire your pond to its full potential.
These products are available from various suppliers and as such the information given below is from the suppliers we use and recommend. That is NT labs, Kusuri and Lincs Fish Health

Activex - Live filter bacteria
Provides all the micro organisms vital to water purity and koi health
Dosage
Spring - 10ml per cu ft of filter medium on days 1 - 5 - 9 & 15
Maintenance - 5ml per cu ft of filter medium per month

Actyzyme - Biological filter starter and sludge remover
Actyzyme pellets contain enzymes and bacteria that aid in the breaking down of toxic ammonia from the fish and the breakdown of organic matter.
They give the biological filter system a boost thus converting harmful nitrite into nitrate.
They also break down the sludge that forms.
Dosage 2.5 gms to 250 galls of pond water every week.
Add double to new ponds or where high nitrite has been recorded.

Algae clear - water flocculent
Algiclear is a liquid chemical flocculent. When added to the water it causes floating particles to clump together so that they either sink, are filtered out, or can be removed with a fine net. Only use the treatment when you have plenty of time to observe the fish, so that action can be taken in the unlikely event of an adverse reaction.
Remember that some treatments can lower the dissolved oxygen content of the water, so ensure there is adequate oxygenation of the pond, either via a pump or air-stone.
The following precautions are also recommended:
Do not use if there is a nitrite level in the water
Do not use in humid, thundery weather
Do not use immediately after feeding
Do not use in the evening
Increase aeration
Keep filters clean
Dosage:
Flush the pond as clear as possible with fresh water before use.
Use 10 mls per 40 gallons of pond water.
Mix the full dose into a bucket of pond water, add this to the pond, and stir into the water. One dose should be enough to clear your pond if the instructions are followed carefully.
If no effect is seen within a few hours of application, do not add more Algiclear, wait a few days and try to establish why the water has not cleared.

Anti-foam - Foam remover
This is non-toxic and can be used in any pond to eliminate the foam caused by a build up of by products of fish metabolism and during the breakdown of uneaten food and fish plant waste.
Anti-foam is also useful for features such as fountains both indoors and out
Dosage
5ml per 1000 galls

Aqua Balance - Blanket weed control
Aqua balance restores the equilibrium in the pond, adding useful trace elements and discouraging blanket weed.
Dosage
50ml to 375 galls weekly (from April to September)

Chlor Go - Dechlorinator
Tap water contains chlorine and chloramines
Chlor Go will remove these.
Use whenever adding tap water
Dosage
10ml to 80 galls

Eco Pure - Biologic and mineral organic pond tonic
This lowers phosphates and nitrates inhibiting algae and blanket weed growth.
Increases water clarity and aids flocculation of suspended solids
Dosage
2 cups (cup provided) per 1000 galls pond water per week

Envirex - biological pond cleaner
This works naturally through enzyme action to lower solids and improve water chemistry Dosage
New ponds - 80 gms per 1000 galls
Mature ponds 40gms per 1000 galls
Maintenance 5 gms per 1000 galls every 3/4 days

GH & Minerals up - GH adjuster
The correct level of hardness of water helps keeping the biological process working correctly Dosage
50 ml to 75 galls until the required GH has been achieved

Klear - Pond water clarifier
Contains nitrifying and denitrifying beneficial bacteria.
Improves clarity and assists reduction of algae if used regularly.
Dosage
Initial 100ml for every 220 galls
Maintenance 50 ml per 1000 galls weekly

Montmorillonite Clay - Increases water clarity
Remineralises pond water,
improves colour and lustre of koi and improves growth and health.
Dosage
1 cup (cup supplied) per 500 galls of pond water weekly

Pond Balance - adjusts the water chemistry of the pond
It promotes plant growth and creates conditions unsuitable for blanket weed
Harmless to filters and plants
Harmless to newts, frogs, toads and other pond wildlife
Dosage
1 spoonful (spoon provided) for every 80 galls of pond water
Repeat treatment every 10 days for 1st month and once per month thereafter

Pro 100 - for the reduction of harmful bacteria
A number of very dangerous pathogenic strains of bacteria like Aeromonas, Pseudomonas,
E. coli, , etc. can cause catastrophic fish losses in ponds.
This has created a strong demand for an effective preventive treatment that does not involve antibiotics, disinfectants, or any other sort of chemical products.
Preventive treatment does not kill pathogens directly; it helps prevent and restrict their development.
If pathogens get the opportunity to proliferate they can infect the least resistant fish.
Good water quality reduces stress in fish and therefore reduces the risk of infection. 
Dosage
5ml per 220 gallons, add daily for 1 week,
Then after initial dose, add 10ml per 1000 gallons every five days.
(Below 15 C increase dose to 20 ml per application)

Pond pH down - pH adjuster
Low pH can cause stress to the fish and encourage the growth of algae
Pond pH should be between 6.0 and 8.0
Dosage
10ml to 15 gall

Zeolite - Ammonia removal
The addition of zeolite will assist the filtration unit of removing toxic ammonia from the system
It is not an alternative
Dosage
5kg to 1000 galls

Note:- All of the above information is provided as a guide only and as such the full manufacturers instructions must be followed at all times when using any of the above products. . .