Choosing a lighting schedule for a shrimp tank

Match lighting to the plants, lamp and incoming daylight. Use a timer so actual duration is known. A dim lamp running longer and a strong lamp running briefly are not automatically equivalent; hours alone do not describe exposure.

A useful starting point

Tropica suggests six hours daily during the first two to three weeks of a new planted aquarium. This is a grower example, not a demonstrated safe boundary for every shrimp tank. Use it only as a starting point for suitable planting and review growth, coatings and temperature. It does not justify adding shrimp to an unchecked new system.

Growers describe Java moss as suited to low-to-moderate light and Anubias as suitable for shade. A plant requiring stronger illumination may need a different choice. Prefer a plant fitting the existing care plan over changing the whole system solely for it.

Adjust from observations

• Record timer settings, dimming and direct sunlight. Check that the timer actually switches.
• Compare new plant growth and coatings in the same locations. Check shade from floating plants or overgrowth.
• In a stable aquarium, change one lighting setting for a stated reason and record the outcome. There is no mandatory weekly increase.
• Follow temperature and animals. Plants do not guarantee adequate oxygen at night; distress takes priority over the lighting experiment.

Retain a daily dark period. Do not compensate for inadequate shrimp food by continually lengthening illumination. For algae, use the targeted assessment.

Sources and scope

• Tropica: Growing-in
• Dennerle Plants: Taxiphyllum barbieri
• Tropica: Anubias barteri var. nana
• UF/IFAS: Dissolved Oxygen for Fish Production

Tropica provides a planted-aquarium startup example. Grower information describes the named plants. Our timer, daylight and adjustment guidance is not an experiment establishing optimal lighting for every shrimp species.