As a medaka fan and aquarist or pond enthusiast, you probably know the feeling: you look at your tank or pond and sees that the water has taken on a green tint. The first reaction is often panic. Algae! But what if I told you that this green water could actually be one of the best things to happen to your brood? In this article I explain why you should perhaps not immediately fight that green haze, but rather embrace it.

Green water: plague or blessing for young brood?

Many hobbyists see green water as a problem that needs to be solved as quickly As possible. and honestly, in an adult aquarium with large fish, that's understandable. but The situation is very different with young brood. Green water consists mainly of microscopic algae particles, also called phytoplankton. these Single-celled organisms float through the water and together form a kind of living soup that creates an incredibly rich environment for newborn fish.

The problem with young brood is a classic one: they are too small to eat normal food, but they do need nutrients to grow and survive. This is exactly where green water offers the solution. Instead of having to dose small portions of food three times a day as a hobbyist and hope that the fish find it, green water offers a constant source of food that is always available. The young fish can literally graze all day long without you having to do anything.

This is how phytoplankton helps your young fish survive

Phytoplankton is the driving force behind green water. These microscopic plants produce oxygen through photosynthesis and form the basis of almost every food chain in the water. They are valuable for young brood for several reasons. First, they are small enough to be eaten by newborn fish, even species with very small mouths. Secondly, they are constantly present in the water column, so young fish do not have to search for food.

But phytoplankton do more than just feed. It also stimulates the growth of rotifers, also called rotifers or rotifers. These are small aquatic animals that feed on phytoplankton and in turn are an excellent food source for slightly larger young brood. So you actually create a mini ecosystem in your breeding tank. Below you can see what the food chain in green water looks like:

1. Phytoplankton grows through light and nutrients
2. Rotifers eat the phytoplankton
3. Young brood eat both phytoplankton and rotifers
4. Young brood grows faster and has a higher chance of survival

Medaka Baby Fish food as a savior against starvation of young brood

Starvation of young brood is one of the most common causes of loss in fish farming. Many breeders only notice it when it is too late: the fish become smaller instead of larger, become lethargic and eventually die. This often happens in the first week after hatching, when the yolk sac is empty and the fish have to look for food themselves. If no suitable food is available, the chance of survival is small.

Medaka Baby Fish Food is a specific type of fish food that is particularly suitable as a solution to this problem. It is a single-celled algae that is packed with nutrients. Below is an overview of the most important benefits:

This gives young brood the best chance of a good start.

Practical tips for using green water

Now that you know why green water is so valuable, the next step is: how do you use it properly? you Do not want your breeding tank to become overgrown with algae, but a controlled amount of green water is exactly what you want to achieve. It's all about balance.

Here are a few practical tips to use green water effectively:

• Use a separate breeding container with plenty of light to grow green water before you need it
• Add the green water to the breeding tank as soon as the fish start swimming (free swimming stage)
• Check the water values regularly, because algae can affect the pH
• Combine green water with infusoria for an even more varied nutritional offering
• Limit use until the first two to three weeks, then you can switch to finely ground dry food or artemia nauplii

A common mistake is to view green water as a replacement for all other food. rather, See it as a supplement and a safety net. It ensures that young brood always has something to eat, even when you are not at home or forget to feed them.

Frequently asked questions about green water and young brood

Is green water harmful to my fish?

In controlled quantities, green water is not harmful. It can even be beneficial for water quality because algae absorb CO2 and produce oxygen. However, extreme algae blooms can disrupt oxygen balance at night, so keep an eye on the amount.

How do i make green water myself?

Place a clear container or bottle filled with aquarium water in a sunny spot or under a lamp. Add a small amount of nutrient (such as a drop of liquid plant food) and wait a few days. The water will naturally turn green due to the growth of phytoplankton.

Which fish species benefit most from green water?

Especially protein-rich species such as cichlids, goldfish, carp and many tropical fish species benefit greatly from green water as young brood. It is also an excellent food source for shrimps and other small aquatic animals.

How long should i use green water?

Green water is most valuable in the first two to three weeks of the young brood's life. then The fish are big enough to switch to other food sources such as artemia, microworm or fine dry food.

Green water is not always the enemy it seems to be. For young brood, it can make the difference between a high mortality rate and successful breeding. By consciously using phytoplankton and algae such as Chlorella, you provide your young fish with a constant food source, stimulate the growth of rotifers and significantly reduce the risk of starvation. So the next time your growing box turns a green hue, you don't have to panic. Maybe nature is just giving you a helping hand.