Freshwater

For tanks of 20–500 l

Difficulty: easy

For tanks of 200–1500 l

For tanks of 45 cm

Difficulty: advanced

For tanks of 100–750 l

For tanks of 60 cm

Difficulty: medium

For tanks of 25–400 l

For tanks of ≤ 25 cm

Difficulty: medium

For tanks of 200–1500 l

For tanks of ≤ 36 cm

Difficulty: medium

For tanks of ≤ 55 cm

Difficulty: easy

For tanks of ≤ 70 cm

Difficulty: advanced

For tanks of ≤ 100 cm

Difficulty: medium

For tanks of ≤ 130 cm

Difficulty: medium

For tanks of 20–25 cm