Fish & Aquatics

Most aquarium equipment is rated by tank volume, so the first step is to know how many litres your tank holds. Choose filtration, heating and cleaning tools that are rated for that volume and that fit the space around the tank.

What Size Filter Does My Tank Need?

Check the flow rate in litres per hour against the volume range the maker lists. Hang-on filters suit tanks with a rear gap and an open lid, while external canisters sit in the cabinet and hold more media for larger tanks. Look at how the media baskets come out, because you will rinse them regularly.

How Do I Pick an Aquarium Heater?

Heater wattage is matched to tank volume and to how cold the room gets. A guarded heater protects larger fish from touching the glass, and an electronic model with a display makes it easier to see the set temperature. Always pair a heater with a separate thermometer.

Which Thermometer Is Easiest to Read?

A stick-on digital display reads from outside the glass and some models give an alarm when the water drifts out of range. A glass thermometer inside the tank needs no battery. Place it away from the heater so you read the general water temperature.

What Do I Need for Routine Cleaning?

A magnet cleaner removes algae from the front glass without wetting your hands, and a long-handled tool set reaches the back wall. A siphon or gravel cleaner makes partial water changes faster. Check that scrapers suit your tank material, because metal blades can mark acrylic.

How Often Should Filter Media Be Rinsed?

Follow the maker's guidance and rinse sponges in old tank water rather than tap water, so the useful bacteria survive. Replace carbon and fine pads on the schedule given in the instructions.