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post #1 of 16 Old 01-26-2009, 03:13 PM Thread Starter
Unrulyevil's Avatar
Help with plants.

Hi all. I have problem... problem that has tormented me for some time now.

My set up is.

2 year old 29 gallon tank:
8 fish
Amazon sword plants 4 of them
Anubias nana and some other anubias
Penguin 150 filter
130W of lighting (usually only 65w on)

Here is my problem. All my plants have little black spots on them after which a thin layer of... what looks like algae appears on the leafs prompting plants to look bad and stop growing.
New leafs come out... but as soon as they stop growing they are attacked by this unknown foe. It does not kill the plant.... but rather prohibits the growth.

It happened with my old plants ... when they succumbed I bought new plants and thinking that this might be aggressive algae growth, I reduced the hours of light to the plants from 10 to 8 .. When that did not help I reduced to 6 that did not help ether.. I was getting lots and lots of algae on the glass... Than I decided to give it 4 hours of light and plants stopped growing but that thing on leafs remained. I do not add any iron or any other fertilizers to the tank. Only liquid co2. Could it be the intensity of the light? ( My lights had little feet to keep the fixture above the tank about 3 inch ) I had removed them and placed the light fixture directly on to the versa top to get more light to my plants. If you will need pictures I will gladly try to attach them here.

Anyone...? any one has any suggestion as to what it is and how to fight it?

Thank you.
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post #2 of 16 Old 01-27-2009, 08:30 AM
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steelerfan's Avatar
Sounds like BBA to me, that's alot of light on that tank with no CO2 injection. BTW, what is your liquid CO2? Excel? Excel is somewhat effective, but nowhere near as much so as injected gas. You may be able to get away with DIY CO2 on a tank that small, but it's tough. I'd suggest leaving the extra 65W off all the time and spot treating the algae with Excel and consider dosing some ferts. Also, the HOB filter probably doesn't provide very good circulation, another potential problem. Maybe consider a powerhead to help with that. HTH!
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post #3 of 16 Old 01-27-2009, 11:15 AM
Yeah with that much light in there you need a better co2 source and definitely some ferts.

.... I'm probably drunk.

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post #4 of 16 Old 01-27-2009, 11:54 AM
I had BBA in a tank that I'm in the brocess of tearing up. I basically just left the lights off and didn't think of the tank for like 4 days, but then I decided to try and save (and sanitize because parasites were the main reason I was tearing the tank down) some of the plants. I turned the lights on for a day and the plants still looked pretty droopy until I took them out to bleach dip them, but the BBA on the driftwood started releasing air bubbles! That is some tough crud! The bleach solution completely annihilated the black spots on the plants though. I don't know if they will make it, but when I took them out after 3 minutes all the algae was gone, it just dissolved!

20 gallon long: 3 adult Neolamprologus similis + about 11 fry of various ages; low light planted tank
20 gallon long:2 freshwater dwarf puffers (Puff Puff and Poofer); medium-light planted tank
10 gallon: 1 male betta named Wormy; low light planted tank
10 gallon: 1 male betta named Dante; low light planted tank
2, 5.5 gallon tanks that are currently empty (I see more fish on the horizon )
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post #5 of 16 Old 01-27-2009, 02:43 PM Thread Starter
Unrulyevil's Avatar
Yes I will use Excel to try and remedy that problem. I had a lot of BBA in the past, I mean that stuff was really hanging down off plants like in the jungle. I changed my filter pad and added charcoal, and BBA went away.. but these black spots are what is left off major BBA invasion. Thank for reply guys, I will follow you advise and #1 lift light fixture above the canopy back to 3 inch, #2 will start adding CO2 #3 get new filter with more flow #4 Added some fers.. Root tabs to be exact.
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post #6 of 16 Old 02-01-2009, 07:14 AM
fishkid's Avatar
I think that once you balance you light, fertilizer, and CO2 levels, the problem should go away.

Everything happens for a reason, but the reason isn't always good.
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post #7 of 16 Old 02-01-2009, 07:17 AM
or you could just change the bulbs. the plans you have listed will do fine in a low light situation. this will also remove the necessity for an expensive co2 system
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post #8 of 16 Old 02-02-2009, 03:38 PM Thread Starter
Unrulyevil's Avatar
Ok.. here is the weekly update on the situation.

I did all of the above and increased the duration of light to 10 hours a day + I started dosing Co2 with Jungle Co2 system.

Right now I see huge decrease in algae on my glass and I started to see small oxygen bubbles on my plats which is good. Still, black spots on leaves remain, I guess it's permanent, lets see if new leafs will get effected.
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post #9 of 16 Old 02-02-2009, 09:12 PM
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You may have to remove the affected leaves as the adjustments you've made will discourage future growth of BBA, but probably not kill what's there. The good news is once you eradicate it, it generally will not come back as long the conditions remain favorable for strong plant growth. HTH!!
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post #10 of 16 Old 02-04-2009, 02:41 PM Thread Starter
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Ok... new leafs come out but they have strange coloration. Amazon sword leafs look like they have orange paint running through the veins of the plant.
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