Aquatics Unlimited: Articles: Lighting Duration
Image 1
Image 2
Image 3

Lighting Duration

for the week of 8/26/99

Just how long should an aquarium light be kept on each day?

In planted or reef aquariums, 10 to 12 hours should be sufficient to give plants the energy to produce sugars and oxygen by photosynthesis - assuming the light is intense enough as well. Duration cannot be substituted for intensity.

Fish-only tanks can receive shorter periods of illumation; it's really only "necessary" to have enough light to see to eat. However, fish do seem to benefit from consistent day length, resulting in more robust and colorful specimens. Eight to twelve hours of daylight is a good range.

Darkness is beneficial as well; both plants and fish require periods of rest in dimmed or no lighting.

An electric timer is an inexpensive yet reliable way to provide proper day length for both fish and plants.

"Tip of the week" appeared regularly in 1999 and 2000.

Copyright © 1999 Aquatics Unlimited
All rights reserved.

Local Specials

Through 12-27-17

12 Days of Coral Sale Coming Soon!

Clown Fish 25% OFF!

Tissue Culture Plants 30% OFF!

Echinodorus Swordplants Buy 3 Get 1 Free!

Freshwater Fish - South Wall Buy 3 Get 1 Free!

In-store Gift Certificate Special Buy a $25 Card Get a $5 Gift Certificate Free!

75 Gallon Tank & $25 Livestock Certificate** Special $100!

Seachem Tidal Filters 20% OFF!

Zilla Mini Halogen Domes & Bulbs 20% Off!

16 Bow Front Tank* $59

26 Bow Front Tank $83

36 Bow Front Tank $99

46 Bow Front Tank $120

72 Bow Front Tank $182

72 Overflow Bow Front Tank $272

54 Corner Tank* $215

54 Overflow Corner Tank* $275

10 Hexagon Tank $34

20 Hexagon Tank $70

35 Hexagon Tank* $99

Select Aqueon Pine Black Stands 20% OFF!

REWARDS account may be required for special pricing. You may sign up and use the special pricing the same day!

* = SPECIAL ORDER; 100% deposit required

** = while supplies last

*** = specially marked tanks only; selection may vary during the sale

Aquatics Unlimited | 3550 S. 108th Street | Greenfield, WI 53228
Monday-Saturday 10:00 a.m. - 9:00 p.m., Sunday 10:00 a.m. - 6:00 p.m. | Phone: 414-543-2552 | Fax: 414-543-4929