Freshwater

For tanks of ≤ 70 cm

Difficulty: medium

Power 0.5 W

For tanks of ≤ 100 cm

Difficulty: easy

For tanks of ≤ 130 cm

Difficulty: easy

For tanks of 20–25 cm

Difficulty: easy

For tanks of 30–35 cm

Difficulty: easy

For tanks of 45–55 cm

Difficulty: advanced

For tanks of 60–70 cm

Difficulty: medium