Freshwater

For tanks of ≤ 50 cm

Difficulty: easy

For tanks of 150–250 l

For tanks of ≤ 500 l

For tanks of ≤ 70 cm

Difficulty: easy

For tanks of 10–40 l

For tanks of ≤ 90 cm

Difficulty: easy

Power 3 W

For tanks of ≤ 100 cm

Difficulty: medium

Power 17 W

For tanks of ≤ 120 cm

Difficulty: medium

Power 10 W

For tanks of 45–55 cm

Difficulty: easy

For tanks of 60–70 cm

Difficulty: easy

Power 1 W

For tanks of 90–100 cm

Difficulty: easy