Freshwater

Difficulty: easy

For tanks of ≤ 70 cm

Difficulty: medium

For tanks of ≤ 90 cm

Difficulty: easy

For tanks of ≤ 100 cm

Difficulty: easy

For tanks of ≤ 120 cm

Difficulty: easy

For tanks of 45–55 cm

Difficulty: easy

For tanks of 60–70 cm

Difficulty: medium

For tanks of 90–100 cm