Solve your problems

  • Low yields
  • Nutrient deficiencies
  • High nutrient costs
  • Inconsistent results


  • Hourly consultation
  • Nutrient solution design
  • Growing setup optimization
  • Custom crop monitoring automation

HydroBuddy and Blog

Through my blog I also share my insights and experience in hydroponic culture. From how to properly use and calibrate sensors to the peer reviewed effects of nutrient additives I strive to make this blog a reliable source of high quality practical information for both the commercial hydroponic grower and the enthusiast alike. This blog has been ranked as one of the top 50 hydroponic blogs on the internet by feedspot.

Welcome to my site!

I provide nutrient related consultation services for the hydroponic industry. My name is Dr. Daniel Fernandez and I have worked as a consultant for the past 5 years in the hydroponic industry. I have a bachelor’s degree in chemistry and a masters and Ph.D. in nanoscience and nanotechnology. With my experience in nutrient solution chemistry and management I hope to help you take your crops to the next level.

Our services

I provide different types of services to suite your particular needs.

I understand that not everyone needs the same type of assistance and I have therefore designed three specific type of services depending on your needs .

  • An hourly consultation service where you can ask any questions and get answers to help you solve problems (150 USD/hour).
  • A service for the formulation of a specific hydroponic nutrient recipe for your particular needs coupled with guidance in preparing this formulation.
  • An on-going consultation service where you will have me available to answer questions and help guide you through your nutrient needs as your crop or hydroponic project progresses.

Hydrobuddy - Open source software for Nutrient Formulations

This site hosts HydroBuddy – a software I programmed – which is the most popularly used open source calculator for the formulation of hydroponic nutrient solutions and fertilizers. This software has been helping hobby and commercial growers prepare their own fertilizer formulations from 2011 with more than 10 thousands downloads in its lifetime. There are also many peer reviewed academic publications that have used hydrobuddy. Feel free to use or modify this software for your nutrient preparation needs. It’s free and OpenSource! Get the software here.

Latest blog posts

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, aeration and solution monitoring can cause significant problems, many of which can lead to crop failure. In this post I want to give you five […]

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 can be maintained. Up until now, this has been mostly achieved with the use of external lab testing but electrochemical developments made during the past […]

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 for dozens of growers and helped many of them solve this issue. There can be multiple causes for the problem but a careful evaluation of […]

The effect of Seaweed/Kelp extracts in plants

Few bio-stimulants are more popularly used than seaweed/kelp extracts. These are used by many growers to increase plant quality and yields, in particular, extracts from the Ascophyllum nodosum species are an all-time favorite of the industry. These extract have also been studied extensively for the past 40 years, with large amounts of evidence gathered about […]

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