Can you share a picture? Sometimes foam is from spawning. I think it can also be from excess phosphates.
Pond is approximately 18 years oldAlso, how old is the pond?
Approximately 9000 litresOh wow! That IS a lot of foam!
I know others on here will have good advice. The first thing they will want to know is how big is the pond/how many gallons?
What kind of filtration do you have?
Do you have fish? How many? What kind?
Do you have plants?
If you don't have one already, I would get on Amazon and order a water test kit for ponds. It will have multiple little vials and drops to test for a variety of different things.
Hang tight! You will get good advice on here!
Good bacteria, Google itWhat is a “pond bomb”?
Evolution Aqua Pure Pond Bomb, helps sludge, water clarity , helps breaks down a lot of the bad stuffGood bacteria, Google it
"Fish spawned heavily today" -- There's your answer. Spawning will cause the 'Mr. Bubble' effect.Approximately 9000 litres
16 Koi
No plants
Fish spawning heavily today
Multi chamber filter and easy pod as polishing filter
Filters cleaned and 2600 litre water change 3 days ago
Pond Bomb used every time filters cleaned
Filters cleaned every 1-2 weeks at present and 1500- 2500ltrs water changed each clean
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