Tensiometers (irrometers) the best way to time irrigations in hydroponics
I have recently written blog posts about the measurements of water content in media in hydroponics. The first one was about the problems with resistive moisture sensors in hydroponics and…
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The Chirp Sensor: A plug-and-play solution to moisture monitoring in hydroponics
If you want high yields in hydroponics, then you need to monitor moisture quite closely. Watering plants when they need it – and not on a timer – is critical…
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How to identify resistive moisture sensors and why to never use them in hydroponics
The measuring of media moisture, also known as water-content, is critical to successfully irrigating crops in hydroponics. Badly timed irrigations cause lots of the problems faced by novice and even…
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Five tips to succeed when doing Kratky hydroponics
Passive hydroponic growing has become very popular during the past 10 years as it has a very low starting cost and uses no electricity. However, growing without active nutrient circulation,…
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Practical use of ion selective electrodes in hydroponics
The achievement of adequate ion concentrations in nutrient solutions, media and plant tissue is key to success in hydroponics. It is therefore important to measure them, so that proper values…
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Inner leaf tipburn in hydroponic lettuce
The most common problem I get contacted for by hydroponic lettuce growers is the appearance of inner leaf tipburn within their plants. During the past 10 years I have consulted…
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Characterizing hydroponic stock nutrient solutions
I’ve written several articles in the past about how to characterize concentrated hydroponic nutrient solutions using simple yet highly accurate small scale methods. I have now released a video showing…
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How tap water affects your hydroponic nutrient formulation
Tap water is often the most reliable source of water for hydroponic growers. However, especially in the North America and Europe, tap water can contain a significant amount of dissolved…
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How much Phosphorous are you adding to your solution to adjust pH?
Phosphoric acid is one of the most commonly used pH down agents in hydroponics. This is because phosphoric acid is available in high purity, is easier to handle and has…
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How to deal with nutrient solution waste in hydroponics
Hydroponic nutrients contain a wide array of chemicals that are fundamentally contaminating to water sources and can heavily contribute to eutrophication. Both run-to-waste and recirculating systems eventually generate significant amounts…
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