lighting for a 20 gallon tall aquarium - Tropical Fish Keeping - Aquarium fish care and resources
 
LinkBack Thread Tools
post #1 of 2 Old 01-21-2011, 03:18 PM Thread Starter
New Member
 
lighting for a 20 gallon tall aquarium

My Marineland tank came with a hood that will only accomodate 1-15 watt bulb. I switched out the bulb for one the LPS said would grow low to medium light plants. However, the water sprite looks stressed and pale as does the Amazon Sword. According to the manufacturer, a higher wattage bulb can not be used in the fixture. What is the best/inexpensive solution for increase the lighting?
bouvie2 is offline  
Sponsored Links
Advertisement
 
post #2 of 2 Old 01-24-2011, 02:48 PM
Member
 
Byron's Avatar
 
The maximum watts for a fixture is due primarily to the heat issue and refers to incandescent bulbs (screw-in). Fluorescent come in standard wattages for the tube length (though some make lesser wattage tubes now that are more efficient) so this is not usually an issue with fluorescent.

For incandescent, using the compact fluorescent bulbs (also screw in) works best. They provide increased light intensity for less energy, and as watts is the measure of energy used by a bulb, this allows you better light with probably fewer watts.

The other issue is the type of bulb, meaning the light spectrum. Plants grow best under "daylight" with a Kelvin rating between 6000K and 7000K. GE, Phillips and Sylvania all make CF bulbs in daylight, with a kelvin around 6500K. I have two 10w bulbs over my 20g. If your fixture only has one bulb capacity, I would get a higher wattage, like the 15w, in a daylight bulb. If you do have two bulbs, two 10w daylight will be good.

The other issue is nutrients; plants need food, some 17 nutrients, and all are unlikely to be present in the average aquarium. A good fertilizer solves this problem. Seachem's Flourish Comprehensive Supplement for the Planted Aquarium is one of the best in my experience. Only once a week, or maximum twice, and in a 20g a 1/4 tsp will be sufficient so it lasts a long time.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
Byron is offline  
The Following User Says Thank You to Byron For This Useful Post:
bouvie2 (01-27-2011)
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Is 30watts of Fluorescent Lighting(Ten Gallon Aquarium) to High For Water Wisteria? alphazetatango Beginner Planted Aquarium 19 01-02-2010 07:32 PM
Lighting for 40gl tall AYE RUSS Beginner Saltwater Aquariums 2 11-07-2009 05:36 AM
New 50 gallon aquarium - lighting question cmjb13 Beginner Freshwater Aquarium 12 08-19-2009 09:56 AM
Lighting recommendation for 45 Gallon Tall tank Blackwood Beginner Planted Aquarium 0 03-31-2009 08:18 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome