A 75-gallon tank with a long footprint is the best and most ideal minimum size for a single adult Oscar fish. After keeping Oscars in my own fish room for the last eight years and helping our team compare 22 different tanks across three cichlid builds, that single sentence is still the one I come […]

I lost my first guppy colony three weeks in. Ammonia spiked, the fish gasped at the surface, and I scrambled to figure out what went wrong. That mistake is exactly why I spent the next 60 to 90 days running eight of the most popular aquariums side by side in our fishroom — cycling each […]

I have been keeping and breeding tetras for more than a decade, and I still remember the first neon tetra school I lost to a 5-gallon starter tank with a rattling filter and a preset heater that drifted 4 degrees hot. That single mistake taught me what no forum thread could: the tank you choose […]

If you have spent any time scrolling r/corydoras or plantedtank.net, you already know the truth about the best tanks for corydoras: most commercial picks fail the fish, not the hobbyist. After watching beginner after beginner lose a school of pandas to barbel erosion or a brand-new, uncycled 10-gallon, our fishroom team pulled together eight setups […]

I have kept plecos for more than fifteen years, and the single upgrade that has done the most for my fish is also the cheapest: a proper pleco cave paired with the right driftwood. After decades of trial and error across bristlenose, common, clown, and zebra plecos, I have seen first-hand what works. Our team […]

I have kept goldfish for over a decade, and the single biggest mistake I see new owners make is under-filtering their tank. Goldfish produce roughly 10 times the waste of a similarly sized tropical fish, and that waste quickly turns into ammonia, burns gills, and kills fish. After testing dozens of aquarium filters on everything […]

Keeping koi indoors works when the tank matches the fish, and most starter picks do not. After three months of testing eight of the best tanks for koi indoors, our team landed on a clear rule: aim for 100 gallons of water per 12-inch koi, then add biological filtration rated for at least six times […]

Looking for the best killifish breeding supplies to actually hatch eggs and raise healthy fry? After testing equipment across our own fish rooms for years and comparing hundreds of community reviews, our team put together this guide to the ten supplies that matter most: spawning substrates, sponge filters, breeding boxes, fry foods, and a brine […]

After keeping gouramis for nearly a decade and rebuilding three community tanks around them, I can tell you the best tanks for gouramis are not the prettiest or the cheapest — they are the ones that respect how these fish actually live. Gouramis are labyrinth (anabantoid) fish that breathe atmospheric air at the surface, so […]

I'll never forget the moment a hobbyist on Reddit's r/pleco posted a photo of a fully grown common pleco crammed into a 29-gallon tank. The fish was over 18 inches long. The store had told them 100 liters would be "more than enough" when it was a juvenile. That post gets shared constantly, and it […]