Choose with confidence

Choose an aquarium filter: hang-on-back, canister, sponge, internal and sump filters, how to size by turnover, mechanical, biological and chemical media.

Freshwater vs saltwater and reef aquariums compared: equipment, startup cost, livestock prices, running costs, maintenance time and difficulty.

Size an aquarium heater: watts per gallon by room temperature, one heater vs two, external controllers, placement, guards and how to avoid overheating.

Choose planted aquarium lights: PAR for low, medium and high-light plants, spectrum, depth, dimming and photoperiod, balanced with CO2 to limit algae.

How to cycle a new aquarium: ammonia to nitrite to nitrate, fishless cycling, the test kits you need, how long it takes, and how to know it is finished.

Reef aquarium water parameters: salinity, temperature, alkalinity, calcium, magnesium, nitrate and phosphate ranges, testing frequency and why stability matters.

Start a planted aquascape: aqua soil vs inert substrate, depth, hardscape stone and wood, when to add pressurized CO2, and plants for beginners.