Bites of insight.
Three-minute reads on ingredients, process, and the aquarium hobby — written by the team, no fluff.
The Best Food for Goldfish (Spoiler: They Don’t Have a Stomach)
Goldfish are the most popular pet fish on Earth and the most misunderstood at dinnertime. Here’s what to feed a fish with no stomach, a bottomless appetite, and twenty potential years ahead of it.
What Do Plecos Eat? Feeding the Janitor Who Won’t Work for Free
That sucker-mouthed catfish wasn’t put on Earth to clean your glass. Here’s what plecos actually need to eat, and why “he eats the algae” is a slow-motion starvation plan.
The Best Food for Guppies, Platies and Mollies (Tiny Mouths, Big Opinions)
Livebearers are the easiest fish in the hobby, right up until you feed them pellets they can’t fit in their mouths. A guide to particle size, plant matter, and keeping up with the fry factory.
Why Krill Makes Fish More Colourful (It’s the Same Reason Flamingos Are Pink)
Fish can’t make red. Neither can flamingos. The pigment behind both is astaxanthin, and the densest natural source your fish will ever meet is Whole Antarctic Krill.
What Do Betta Fish Eat? Wild Diet vs. Your Tank
A betta in the wild has never seen a flake. Here’s what these little carnivores actually eat in the rice paddies of Southeast Asia, and how to match it at home.
How Much Should You Feed Aquarium Fish? (And Why Your Water Goes Cloudy)
Overfeeding is the #1 beginner mistake in the hobby, and the usual culprit behind cloudy water, algae and ammonia spikes. Here’s the simple rule that fixes it.
What Do African Cichlids Eat? Feeding for Color, Growth and No Bloat
Mbuna graze algae off rocks; haps and peacocks hunt. Feeding the wrong diet is the fastest route to Malawi bloat, here’s how to get it right.
Water clarity isn’t a luxury. It’s a diagnostic
Cloudy water is the most common complaint we hear from new aquarists. Most of the time, the food is doing the talking, and most of the time, the fix isn’t a stronger filter.
Why whole ingredients matter, and what gets left out
Most aquatic feeds rely on cheap fillers and processed by-products. Here’s what “whole-ingredient” really means at NorthFin, and why it changes how your fish actually digest the food.
What ash content tells you about a fish food (and why higher isn’t better)
Every guaranteed analysis lists "Ash (max)." Most aquarists ignore it. They shouldn’t, it’s the cleanest single signal of how the food was made.
Inside the extruder: how low-heat steam shapes every pellet
Most fish feeds are pushed through high-temperature dry extrusion to save cost. We use twin-screw steam extrusion at low heat, and the difference shows up in nutrient retention.
Matching formula to species: a five-minute guide
Picking the right NorthFin formula is mostly about understanding three things: what your fish naturally eats, where they feed in the water column, and how big their mouth is.