Freshwater

For tanks of ≤ 200 l

Difficulty: easy

Power 7–11 W

Difficulty: easy

For tanks of 1–800 l

For tanks of ≤ 200 l

Difficulty: easy

For tanks of 10–300 l

Power 3 W

Difficulty: medium

For tanks of < 30 l

For tanks of ≤ 500 l

Difficulty: medium

For tanks of 100–150 l

Difficulty: easy

For tanks of 150–250 l

Difficulty: easy