Freshwater

Difficulty: medium

For tanks of ≤ 80 l

Difficulty: easy

For tanks of ≤ 250 l

Power 4.4 W

Difficulty: easy

For tanks of ≤ 250 l

Power 7–11 W

Difficulty: easy

For tanks of 100–700 l

For tanks of ≤ 690 l

Difficulty: advanced

Power 7–11 W

For tanks of ≤ 250 l