Stephen Lee

We tested analog and digital refractometers for reef tanks to find reliable salinity checks, from budget dual-scale units to a premium digital model.

Loose carbon, pre-bagged media, and model-specific inserts compared: what clears a tank, what fits your filter, and what you pay for the convenience.

Liquid drops or dip strips? We compare six ammonia tests on range, read time and tests per kit, so you can catch a spike before it costs a fish.

We tested liquid reagent kits, strips, and pH pens to find the aquarium pH test worth buying — and the ones that make weekly testing easy.

We tested aquarium CO2 regulators and picked the ones that hold a steady bubble rate, fit common cylinders, and seal without fuss.

Find aquarium moss that actually arrives healthy and matches your tank size, without overpaying for dead or undersized portions.

We tested long flexible aquarium tube brushes for filter hoses and air lines. Here are the picks that reach the gunk without jamming.

We tested long stainless aquascaping tweezers, from 27 cm nano pairs to an 18.9-inch deep-tank reach, and picked the sets worth planting with.

We tested slow-sinking sticks, micro pellets and time-release blocks to find foods that stay in the water long enough for every fish to eat.

We tested betta water conditioners for dose size, ammonia control, and smell. Seachem Prime tops our list; here’s what to buy for a single bowl.