Lowering lights: Report
Alright let's share my finding for Week One
Upon discussion here: http://www.tropicalfishkeeping.com/a...watt-55g-36847 On feb 8th I lowered my lights on the 55g to 1x32w (4ft) @ 5000K and 2800 lumens run 10hrs a day.
What I noticed right away was the impressive change in the Cory's behaviors with the dimmer lights. They're much more outgoing now all day long not only before "Sundown" and just appear overall happier and more active if you know what I mean. So that's a big plus and I hope for them, my plants long term, will agree to this set up.
On the 4ht day with the lowered lights I noticed my Red Wedntii looking like over-boiled spinach; what I didn't know up until that point Crypts react the same way to over lighting as well as lowering it; but I'm confident it'll grow back new leaf's quick, so while I was surprised about the influence there, I'm not very concerned.
On a overall personal note the tank looks much "softer" now that I changed the lights which I pers like a lot.
I will keep you posted how its all developing over the next 2-3 week and what up's and down's I'll discover there :-D
Thanks for the constant update! I'm looking forward to learning how the change effects your tank. As I stated via PM, I got 2x20w at 5000k's each and 850 lumens, labeled "Natural Sunshine". I hope I have as much success as you do!
Oh 1 thing I forgot to mention in the report:
I used to have a lil BB algae develop within the Java moss in that tank like maybe 3-4 lil fuzzes (funny part is I never put any Java moss in that tank to start with) anyway it's been turning grayish-white today like dieing off so that's a plus there too :-)
Day 9 of having lower lights
Lost a "total" of 5 Crypt leaves now it stopped shedding.
My Vallis, spc the corkscrew - Somehow I always thoughts/ understood they're plants that light thing a lil brights- well obliviously I was mistaken there cause mine now stretched all the way up the back wall of the 55g all the way across the surface and twisted around again. It is very safe to say this plant is currently growing at a rate of 1"/day its crazy what a difference the lights made to it.
No other plants have a comparable "explosion" growth, just normal growth :-)
No losses and no signs of malnutrition, which I am sure if there was plants totally NOT appreciating that new light situation at all I'd see signs such as yellowing by now.
Oh the lil BB algae I had after having turned white-gray is totally vanished now so signs left nowhere so that's a interesting side effect find IMO.
So 30w Sunlight over 55g is apparently my new way to go now :-)
Hmm...now you've got me thinking. I got the GE 2x20w at 6500k. Is the Sunlight 5000k? Now I'm wondering if I should go with 2x15w instead of 2x20w.
Interesting observation about the Corys...
I have a new 44g corner that's been up for about 2 1/2 weeks w/ a 18W Aqua-Glo (18k K, 290 lumens) and an 18W Sun-Glo (4200 K, 840 Lumens). As a total noob w/o any type of green thumb, I think my plants are doing well, and I'm happy with the color rendering in the tank with this setup. But, I have a 1/2 dozen Albino Corys in the tank that just seem really lethargic, just sitting on the bottom most of the time, but I do notice that a couple tend to get a little more active for a little while right after the lights go out. I may have to experiment with leaving one or the other off for day and see how they respond to the changes in lighting.
LMychajluk, I'm not sure how much this has to do with your lighting. Cories are extremely sensitive to ammonia, nitrites, and high nitrates. With your tank only being 2 1/2 weeks old, it might have more to do with that. Did you seed this tank from an existing tank or fishless cycle this tank at all?
No, I didn't, and it very well can be the water chemistry that's affecting them. My pH was fluctuating alot the first week, and ammonia was in the .5 range for a bit (still is, but I treated w/ Ammo-Lock to protect the fish w/o interupting the cycle). I don't want to hijack this thread if the Cory discussion isn't relating to the lighting, but if you have any other thoughts, I have a thread going on my tank setup and Byron's been guiding me along over here:
As for the K, I think you will be better with the 6500K tubes. But those you can exchange after you try them if you don't like the colour. From the plants perspective I can't see much difference, except for substrate plants that are red (not thinking crypts).
Lisa I had the specs for comparision previsously posted in the discussion thread that lead to this report, here ya go
(Info only for GE Florescent EcoLux Bulbs!!!)
Name: GE Sunshine VS. GE Daylight
Size: 48" T8 / 48" T8
Energy Used: 32 watts / 32 watts
Light Output: 2800 lumens / 2700 lumens
Color Temp: 5000 Kelvin / 6700 Kelvin
CRI: 86 / 78
2x20w as you have bought it will be just fine. Pers whenever I deal with 2 bulbs I mix 1xdaylight 1xsunlight. In the 55g it just so happened when I started this "experiment" I took the 1 daylight out and left the sunlight in. As far as I know from what you told me our 55g's are the same sizes (4ft long x 20" tall x 13" wide)!?
@LMychajluk IMO thats very blue end/ bright light there for the fish & plants with the 18,000k and very little lumens for the plants.
What substrate do you have with that high light for the Cory's?
Also as Lisa said Cory's don't do well in new set ups so check your parameters there;-)
And you can "hijack" and ask all you like here:-D that's what we all are here for.
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