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why is this happening to my plants?

2.4K views 17 replies 5 participants last post by  gdgiordano  
#1 ·
This sword us about three - four weeks old. After about the second week these spots started turning brown. I have several chain swords that were growing and spreading like wildfire. They have slowed down considerably in the last two weeks and the biggest of those plants has turned completely brown. What would cause this? Lighting,nutrients???
 

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#4 ·
I have been using Flourish liquid since I added the first plants. I Stopped the liquid And added the tabs a couple weeks ago. As far as lighting I have two 15" 18watt tubes. That's all the light I can get in my hood. How does one get 2watts per gal when your hood won't run that amount of light? I have not found 15" florescent tubes that were more than 18watts
 
#6 ·
It is no longer about watts per gallon. You need to get the right spectrum.

If you are using fluorescent lighting then you should find specifically for plant growth.

On my 50g I have a 6700K and 10,000K light. I use T5HO.

On my 10g I use 2 CFL (spiral) bulbs that are rated as daylight.

My guess is that you're using the standard fluorescent tubes which are T8 if I am not mistaken.
 
#9 ·
Part of the problem could be that you have 15 inch lights on a tank that is 48 inches long.

I have Dual-Lamp T5-HO | Aquatic Life. I would suggest this is you are serious about a planted tank. It is not cheap. I think that I paid $120 for my 36 inch one at a specialty aquarium store. Also, you have to make sure that your top is clear glass that won't block light.

I think my model came with a Roseate (?) bulb but, like I said, I use a 6700K and a 10,000k bulb. I do not get 2 watts per gallon but my plants grow like mad. I have mine on a timer that comes on at 4PM and off at 12AM.

If you're using ferts but not the proper lights, the plants cannot use the nutrients properly.

If that is too much $$ for you, go to Home Depot and get the a few metal wok lamps and c=some CFL daylight spectrum bulbs. That might also help.
 
#13 ·
A shorter light isn't good, your light should cover your whole tank.
I would get a finnex stingray led light, they are good lights for most plants, pretty cheap, and last a few years before they need to be replaced.
 
#14 ·
So from what you guys are saying am I correct to assume that if you buy a aquarium "kit" or "package" the lighting and hoods included are not sufficient for a real healthy planted low tech aquarium set up? Are the lights and hood something that is normally upgraded?
 
#15 ·
Yes, most aquarium kits are bad as is, the light that comes are usually just so you can see the fish.
Yes, most people upgrade there lights when they go planted, also sword plants don't do well in low light.
 
#17 ·
yes "kits" leave most things to be desired with the exception of 10g kits that have the old incandescent light hoods. Those hoods are excellent lights for 10g tanks using spiral "pig tail" 6500k compact fluorescent lights.

For 48" tanks I Like using shop light utility fixtures with 6500k tubes. they cost around $15 from building supply stores. They are also ugly unless under a hood but I don't care all that much.

just a thought.

worth at most .02