Question Regarding Lighting

ronyam040404

AC Members
Oct 15, 2004
8
0
0
jacksonville, fl
Good morning!

After a year of contemplating and a month or so of reading everything I can about planted aquariums, I have decided to just go ahead and jump in. This board has been most helpful.. even more so than some of these books I've paid tons of money for! I can't thank you all enough for sharing your experiences on this board. Your messages have provided me with a lot useful information. When I first got interested in planted aquariums, I started doing a little reading and realized at that time I just didn't have the wherewithall to even think about it but, I believe now I have a better understanding of how it all works. Since I've seldom done more than shop by measurements to replace bulbs in my aquariums, the lighting options for planted tanks are still a little mindboggling though. Who knew, so much thought went into light? WOW!

I do however have one question and I apologize if the answer is obvious. My question is:

If a planted tank requires 1.5 - 3 watts of light per gallon and I wanted to grow plants that require high light, would 3 watts per gallon provide the high light required or would I need to exceed the recommended watts per gallon? In other words, is the 1.5-3 watts formula the general guideline with 1.5 watts being the minimum to grow low light plants and 3 watts being the maximum for growing high light plants?

I don't know if you will need further information regarding my tank to answer this question but, just in case:

-it is a 29gal all glass and is 16" tall (I measured only the glass portion);
-I intend to use a mixture of Eco complete and Flourite to form a 3-4" substrate;
-I have an Aqua clear 200 filter and hope to leave it in place... I may "cut the lip" so the water pours straight down.
-I will employ some type of DIY Co2 injection.. either 2L bottle or one of those Co2 fizzy tab kits I've seen on the net.

I haven't really decided which plants to put in, yet. I like them all! I figured that would be the "easy" part once I get all this technical stuff worked out.

Thanks again for being here and I really appreciate any insight you can offer.
 
The answer to your question, in most cases is yes, it will.
Every tank is different. I can't grow Glosso successfully(horizontally) at 3 watts/gal, but Tom Barr says it can be done. I have grown some 'red' plants at 1.5 watts. that all the books say need 3-4 watts/gal.
The rule of thumb does not apply in all cases, but typically with 60 - 70 watts, in your tank, especially if they are CF watts, should give you the ability to grow a wide variety of plants.
At that wattage you should absolutely start looking at CO2 injection and planting heavily from the start. The 2ltr. is the better option for your tank. I'm not convinced that the 'fizzy' option is very effective at all.
You can put a sponge over the lip of your 200 to cut way down on surface disturbance. You don't, IMO, want to go too heavy with the fish load with that filter as it is a bit under powered for a 29.

Len
 
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