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Fish container: Which one to choose? Marking!

It often happens that if there is an aquarium at home, an abnormal situation may arise (spawning, aggression, quarantine, fry) and we urgently need to resettle someone in a separate container. It is clear that if you are a beginner aquarist, then at your hand is unlikely to be a separate aquarium.

And the easiest way in this situation is to buy a plastic container. They are not expensive, have a rectangular shape and tightly closed with a lid. (At the very least, even a liter 5 liter water bottle with a top cut will do.)

But after my recent post about the treatment of Ichthyophthirius multifiliis, in one of the facebook groups the whole discussion broke out about which plastic container is suitable for quarantine of aquarium fish.

I myself have already written before that the container for fish should be chosen exclusively for food.

But as it turned out, it is not so simple. And even food plastic containers can be very different from each other.

Therefore, I tried to collect all the available information in one place, and provide it from the point of view of aquarism. And also to give examples from personal experience of using a jigging container.

Plastic container for fish. Primary requirements.

So, in order for a plastic container to be safely used, it must:

  • Be absolutely harmless to fish, shrimp and snails.
  • Chemically stable. That is, do not enter into a chemical reaction with drugs, water conditioners, and so on.
  • Resistant to temperature. For example, to store frozen fish food in it in the freezer.

Plastic container. Types and designations.

Next, I made and translated a table with the main types of symbols found on plastic containers.

The container for fish, plastic, food, designations (marking) are presented in this picture. Container food plastic for aquarium fish with marks can be seen in this image.
Container for fish. Marking
  1. Polyethylene terephthalate - Mainly used in the manufacture of disposable tableware. Not reapplied.
  2. HDPE - used for the production of semi-rigid containers. One of the safest types of plastic.
  3. Polyvinylchloride - used for the production of cling film. Quite toxic, especially when burning.
  4. Low-density polyethylene - used, for example, for the production of plastic bags. Less safe.
  5. Polypropylene - often used in the manufacture of plastic containers. As well as #2, it is one of the safest types of plastic.
  6. Polystyrene - it is known in the form of polyfoam. In the food industry is not used.
  7. Other types of plastic - Often contain toxic substances. Do not use!

As for the icons from the second line, it is clear that the more of them, the better. After all, if a plastic container can be, for example, washed in a dishwasher, then it will be 100% thermo and chemically stable.

The only badge that is simply required to be present on the container is the “For Foods” badge. (See the table above).

Container for fish. My experience.

When we got an angelfish caviar in the general aquarium, and it urgently needed to be taken away from the parents, I went to the nearest supermarket and bought a plastic container. Then I did not think about the types of plastic, but purely by intuition I guessed to buy a container with the designation “For food”. Now I looked, and there is a marking of plastic №5. That is, one of the safest.

And I can say that it is. Who just did not live in my containers. And the angelfish'es larvae hatched from caviar, and danio rerio spawned, and Shrimps with Snails lived for a month, and Tetra Glo 2 sat for weeks with medications. All alive and well!

Video about how we use plastic containers in our aquarium economy:

  1. First day of life Scalaria (Pterophyllum).
  2. Spawning Danio-Rerio Glo in our kitchen.
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