Скачать или смотреть Fensmere Fish Farm Summer Water Scare | The importance of regular water testing!

After a brilliant Saturday meeting with Benoit and Loris, I returned to Fensmere Fish Farm for routine summer water testing — and what I found could have spelled disaster for our carp.

With optimal water temps for growth, we’d been feeding heavily to maximise weight gain, but a dry spell and no water flow into the main lake meant the nitrogen cycle was under pressure. My tests revealed:

Ammonia: 0.1 higher than ever recorded here

Nitrite: 0.05 — again a record high

pH: 9 (usually 6.8–7 in our region!)

I immediately stopped all feeding and set up a pump from the river, pushing 1,100 litres/minute to refresh the lake. Over 3 days, we pumped around 2 million litres — so roughly a 7% water change in a lake holding around 30 million litres.

The results?
✅ Ammonia back to normal
✅ Nitrite back to normal
✅ pH dropped to 8.5
Catastrophe averted — and a great reminder of why constant monitoring is vital in fish farming.

In this video, you’ll learn:

How water quality can change fast in hot weather

The signs of a potential water chemistry crisis

Emergency steps to protect carp in summer

Why testing for ammonia, nitrite, nitrate, pH & dissolved oxygen is essential

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