How much is too much light? Lighting options for a 20H - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 10-25-2005, 09:02 AM Thread Starter
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Question How much is too much light? Lighting options for a 20H

Hello lighting experts,

I'm in the process of setting up a new 20H, and I'd really appreciate advice on lighting options. The 20H will be a Southeast Asian biotope tank, with java ferns, moss, cryptocorynes and vallisneria in a substrate of eco-complete. Fish will include a betta, a couple of dwarf gouramis, maybe some danios and some loaches. I'll add more plants as the tank establishes itself.

I understand that the minimum wpg is ~2.5, but is there a rule for determining the maximum wpg for a tank? What is the best wpg for my 20H setup?

At first, I was going to get the 1 x 65w Coralife hood.....but now it seems that 65wpg will put me into the "low light" range.
Is 130w (2x65) or 110w (2x55) way too much light for a 20H?
Should I go with a 72w (2x36) hood?

Thanks so much!!
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post #2 of 5 (permalink) Old 10-25-2005, 10:39 AM
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Not a lighting expert, but...

You will easily be able to grow the listed plants with a single 65w fixture. IMO you will be able to grow most plants with that set up. DIY CO2 will be a good idea as well.
anshim:
Quote:
I understand that the minimum wpg is ~2.5, but is there a rule for determining the maximum wpg for a tank?
Most rules in this hobby are at most guidelines. That said the more light on a tank the more diligent you must be in your fert schedule and maintenance of CO2 levels.
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post #3 of 5 (permalink) Old 10-25-2005, 01:08 PM
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Agreed...you'll be fine with the 65w fixture...not to mention you're actually at the "3 wpg" area. I have the same on a 29g (same height) and my plants grow fine with good ferts and lots of co2.

40g AGA Breeder: Pimp# 44: Eheim 2026; Anti- Filstar; CLTT UV; 3 wpg PC, pressurized CO2. GATA! FTD!!!
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post #4 of 5 (permalink) Old 10-25-2005, 08:45 PM Thread Starter
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Great - thanks so much for the info!!! I'm going with the Coralife 1x65w.


This forum has been sooooo helpful!

Anshim
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post #5 of 5 (permalink) Old 10-26-2005, 04:07 PM
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With 3wpg you really, really, really need to have CO2! You don't mention that anywhere. If you're not going to have CO2 then you'll have way too much light and a mess on your hands...

Eheim Pimp #83

Eheim 2126, 2026 and 2222, 2x Eheim autofeeders
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