🐠 Aquariums + starter kits
A 30 L "first tank" is the most common reason people quit fishkeeping after 6 months. Bigger tanks are MORE forgiving for beginners — water chemistry stays stable, fish are less stressed, and you don't have to upgrade. Here's how to pick a tank you'll love a year from now.
Photo: Dmytro Bukhantsov / Unsplash
Fine for ONE male Betta with live plants. Not enough water volume to be stable for community fish. If you're tempted by the cute size — get a bigger tank instead. Beginners do worse with smaller tanks.
The sweet spot. Big enough that water chemistry is forgiving. Small enough to fit on a desk or shelf. Suits a small school of guppies + corydoras + a betta. Pick a kit with a quality filter (Fluval, Eheim) over a no-name supermarket box.
When you're ready to step up — still beginner-friendly but room for variety. Tetras, corydoras, guppies, dwarf cichlids, all comfortable. Live plants thrive at this size. Good first investment if you know you'll stick with the hobby.
Big enough for fancy goldfish (yes, properly), discus, larger schoolers. Almost crash-proof on water chemistry once cycled. Costs €400–€800 for the kit + stand + filter. The "I wish I'd started here" tank.
Common goldfish reach 30 cm and need pond life. A 1000 L+ pond with proper filtration outlives most pet hobbies. Read up on Irish climate considerations (winterising, predator-proofing) before building.
These are the safety-critical items. A cheap filter underflows; a cheap heater fails open and cooks fish. Brands worth paying for: Fluval (filters), Eheim (filters), Aquael (heaters), Hagen (heaters). Always pair a heater with a separate digital thermometer.
Kit-supplied lights are fine for fish-only or low-light plant tanks. Only upgrade if you're doing high-tech planted (CO2 + ferts), where you need 6500K + decent PAR.
The single most-skipped step. Run the filter for 4–6 weeks with an ammonia source (raw ammonia drops or a hardy starter culture) until ammonia and nitrite both read 0 and nitrate appears. Skip this and your first fish die in 7–14 days. API Master Test Kit (€30) is non-negotiable.
Irish Water adds chlorine (and sometimes chloramine) which kills both fish and beneficial filter bacteria. Use a dechlorinator (Seachem Prime, Tetra AquaSafe Plus) on every water change. €10 for a bottle that lasts a year.
The "1 cm of fish per litre" rule is generous. For a beginner-cycled 60 L tank, start with 6–8 small fish max. Stock heavier later when you understand your tank's rhythm.
Alleavia doesn't stock or ship pet supplies. Our breed-matched buying guides pick the right aquariums and starter kits gear and link out to Amazon — and the calculators, breed guides and AI vet tools below are always free.
Honestly, 60 L. Anything under 40 L crashes chemistry too easily for a new keeper to handle. The "nano" tank trend is responsible for thousands of dead first fish every year. Bigger is more forgiving.
Brand-name kits (Fluval Edge, Eheim AquaBay, Aquael Leddy) are great value — the manufacturer matched the filter, lighting and lid to the tank size. No-name supermarket kits often pair an underpowered filter with the tank, leading to chronic problems. Spend €120–€220 on a quality kit, not €60 on a cheap one.
Fishless cycling: 4–6 weeks typically. You'll see ammonia spike, then nitrite spike, then both crash to zero while nitrate climbs. Speed it up with bottled bacteria (Seachem Stability, Tetra SafeStart) — adds reliability but you still wait for full cycle confirmation via test kit.
Almost always normal for new tanks: bacterial bloom (white cloudy) or sediment from new substrate (settles in 24h). DO NOT do a water change to fix it — you'll prolong it. Wait. If still cloudy after 2 weeks WITH fish in, test for ammonia.
Join 1,000+ Irish pet owners getting our weekly tips, food recall alerts and breed deep-dives. Unsubscribe in one click.
No thanks, I'll find my own way →
By subscribing you agree to our Privacy Policy. We never share your email.
