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Thread: Lighting an Aquarium with PAR instead of Watts Reply to Thread
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Topic Review (Newest First)
09-02-2015 12:57 PM
niza Ups, you are right!

I decided not to use that fixture any more since I want to have a low tech tank and I am not able to use any lower wattage bulbs.

I will use the cheap fixture that came with the tank and add 2 x 13W cfo bulbs.
09-01-2015 04:14 AM
mattinmd Wait,

That bulb, at 14 watts, is a T5NO bulb.
That fixture is a T5HO fixture, and needs a 24 watt bulb..

These two things aren't supposed to be used together.
09-01-2015 03:18 AM
niza
Quote:
Originally Posted by burr740 View Post
Im confused niza, are you running the T5NO bulb(s?) in the HO fixture? or is that in addition to the 4 T5HOs?

That SunDial unit looks like it has pretty good reflectors, at 13" your probably in the 140+ range with 4 T5HOs
I apologize for the confusion. I am only running one T5 bulb in the fixture (you have the specs above). What do you think?
08-31-2015 10:19 PM
burr740 Im confused niza, are you running the T5NO bulb(s?) in the HO fixture? or is that in addition to the 4 T5HOs?

That SunDial unit looks like it has pretty good reflectors, at 13" your probably in the 140+ range with 4 T5HOs
08-31-2015 09:09 PM
niza I have a 24 inch Current USA SunDial T5 HO 4x24W fixture:
http://www.marinedepot.com/24_inch_C...FIT54U-vi.html

And a 6,700K T5 Fluorescent Lamp - 14 W - 24" bulb:
http://www.bigalspets.ca/6-700k-t5-f...p-14-w-24.html

The light fixture is 13 inches from the top of the gravel.

According to my calculations, I have about 27 PAR. Are my calculations right?
04-19-2015 12:37 AM
V1peR
Quote:
Originally Posted by burr740 View Post
Par

Ok so with my crappy reflectors I might be able to get 90-100 par at 24 inches, i will do that tomorrow , I hope I don't get an algae bloom !
04-18-2015 04:36 PM
mattinmd
Quote:
Originally Posted by Wilderman204 View Post
Sry if it's been asked or posted already, but any par value information on the "Fluval Aqualife&plant LED"?? I'm running the 25w model on a 20high. Killer thread btw!!!
This is the best I can find, which is a "heat map" graph of PAR for the 48" fixture at 6" depth:

http://www.plantedtank.net/forums/sh...6&postcount=39
04-18-2015 04:26 PM
burr740
Quote:
Originally Posted by mlongpre dxYh View Post
130 par at substrate? Man how much co2 are you pumping in? Do you have fish? I'm finding it hard to get my plants to grow with only 50 par. Curled gnarled tiny leaves is all I seem to be able to grow.

I'm finding it hard when I see such high par tanks with amazing growth. 5kh water and I drop the ph down to 6.1 and it stays there all day. That combined with 50 par and ei is giving what looks to be like co2 deficiency. I can't fathom how it would even be possible to get enough co2 in the water with such high par. Also use 5kh drop checker that turns yellow green.
Not sure how much CO2, PH drops about 1.2. Yes I have fish, one gourami and several Pristellas, neons, ottos flying foxes, etc. I dose full EI and do 50% weekly water changes...at least. Sometimes every 4-5 days. Also have pretty good surface agitation (you can see in that one pic) and and flow throughout.

50 PAR will grow just about anything, assuming other conditions are met. I have a lot of these same plants in another tank about 50 PAR using only Excel, no CO2.

Honestly, I didnt even realize I had this much PAR until I got that meter a few weeks ago. Always assumed it was in the 80-90 range. I would raise it up some but my homemade mounting bracket only goes this high. And since it aint broke, so to speak...
04-18-2015 04:14 PM
Wilderman204 Sry if it's been asked or posted already, but any par value information on the "Fluval Aqualife&plant LED"?? I'm running the 25w model on a 20high. Killer thread btw!!!
04-18-2015 03:16 PM
mlongpre dxYh Yeah I've been trying to figure this one out for almost a year now. Been very frustrating. My water quality report for the city of Toronto Canada says that I should have enough Ca and Mg. 35 and 9 ppm respectively. Is that enough of those nutrients.

Sorry I feel like I'm jacking the thread. I'll create a new one.
04-18-2015 02:30 PM
mattinmd Tiny curled leaves sounds more like a nutrient deficiency than too much light... Calcium deficiency immediately pops to mind when you're talking twisted growth...

Too much light causes photoburn, but that's *really* hard to do with our aquarium lights... Full noon sunlight is around 2000 PAR, depending on where you live and what time of year you're talking. 50 PAR isn't going to photoburn anything other than mushrooms and maybe the most sensitive of ferns.

Also photoburn first starts off looking like dark brown patches forming on the leaves, like this basil plant:

ie: http://forums.gardenweb.com/discussi...-with-my-basil
04-18-2015 02:22 PM
mlongpre dxYh 130 par at substrate? Man how much co2 are you pumping in? Do you have fish? I'm finding it hard to get my plants to grow with only 50 par. Curled gnarled tiny leaves is all I seem to be able to grow.

I'm finding it hard when I see such high par tanks with amazing growth. 5kh water and I drop the ph down to 6.1 and it stays there all day. That combined with 50 par and ei is giving what looks to be like co2 deficiency. I can't fathom how it would even be possible to get enough co2 in the water with such high par. Also use 5kh drop checker that turns yellow green.
04-18-2015 12:41 PM
burr740 Par
04-18-2015 12:20 PM
V1peR
Quote:
Originally Posted by burr740 View Post
Without knowing more about your fixture, ie reflectors etc, here's mine @ ~24 inches. Bulbs are one actinic, one 3000K, one 6700K and a 6500K.






I forgot mentioning reflectors, I have crappy ones, just a chrome foil that is behind the tubes, nothing fancy at all.

Are those PAR or LUX?
131 PAR are a lot of light I like that !
04-18-2015 10:15 AM
burr740
Quote:
Originally Posted by V1peR View Post
I would like to have the highest light possible using my setup (co2+seachem ferts + dirt substrate)

At the moment i have 2 T5HO bulbs at 16 inches from the substrate.
But i would like to use all of my 4 Bulbs (by raising the lighting unit).
This way I will be able to create different spectrums using different kelvin tubes (was think of 1 3000k, 1 4000 kelvin and 2 6500 kelvin)

How much should I raise my lighting unit to achieve this "high" light with 4 T5HO?
Without knowing more about your fixture, ie reflectors etc, here's mine @ ~24 inches. Bulbs are one actinic, one 3000K, one 6700K and a 6500K.





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