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Which aquarium suits you?

Answer six short questions to get a tank suggestion from six proven all-in-one kits, the equipment you need and the running costs.

How wide is the spot? Under 60 cm
Nano, better suited to shrimp about 60 cm
Small starter tank (~54 l) about 80 cm
The most popular size (~120 l) about 100 cm
Plenty of room for schools (~180 l) 120 cm or more
Large tank (~240 l), needs a sturdy cabinet

What appeals to you most? A colorful school of fish
Tetras, rasboras, livebearers Shrimp
Small, peaceful and fascinating to watch Plants & aquascaping
A green underwater landscape Cichlids
Colorful, full of character, territorial

How much time do you have per week? about 15 minutes
It should be low-maintenance about 30 minutes
Water changes and a bit of gardening 1 hour or more
I want to really design it

How much do you want to spend on tank and equipment? Up to €200
Starter all-in-one set €200–400
Solid brand set with cabinet €400–600
Bigger set, more room to play Over €600
Start big right away

How warm is the room most of the time? Rather cool
below 20 °C Normal
20–23 °C Warm
above 23 °C

Do you know your tap water? Soft
below about 8 °dH Medium
about 8–14 °dH Hard
above about 14 °dH I don't know
No problem, we'll sort it out later

Your suggestion

Answer the questions, the suggestion appears here.

How the suggestion is made

The available width decides which kits fit at all, with a few centimetres of leeway. Below 60 cm we do not suggest fish: the animal welfare report of the German Federal Ministry of Agriculture gives 60 cm length and 54 litres as the minimum for keeping fish permanently. Cichlids need their own territories, so only from about 100 cm.

Among the kits that fit, we recommend the largest one within your budget: a bigger tank is more stable and forgives more mistakes. Room temperature and tank type determine whether you need a heater, and from that the electricity cost.

The six kits

The suggestions come from our comparison of proven all-in-one kits on aquariuminsider.de: Fluval Flex 2.0 (57 L, for shrimp only), Tetra Starter Line 105, JUWEL Lido 120, JUWEL Rio 125, Rio 180 and Rio 240. All include a filter and lighting, most also a heater.

The full plan is in the app

The planning quiz in Aqualizer also asks about location and tap water and saves your tank as “planned”: with a shopping list, layout templates, a top view and a stocking suggestion. Once the tank is set up, one tap turns it into a running tank.

Shopping list with amounts
Layout template with plants and animals
Cycling assistant afterwards

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Getting started FAQ

Which aquarium is good for beginners?

A tank of about 80 cm length and 100 to 125 litres. It is more stable than a small one, forgives mistakes and leaves room for a school of fish. All-in-one kits with filter, light and heater save you choosing the equipment.

Is a small aquarium easier?

No, rather harder: in little water, temperature and readings change faster. Small tanks under 60 cm suit shrimp and snails well; for fish a bigger tank is easier.

What does an aquarium cost per month?

Electricity for heater, filter and LED usually comes to €3 to €9 per month for a 125-litre tank at average EU prices, up to about €14 in a cool room. On top come food, water conditioner and occasionally plants or fertiliser.

How long until fish can move in?

After setting up, the tank usually needs 3 to 5 weeks to cycle. Only when ammonia and nitrite are at zero do the first animals move in.