Does high bioload effect plant growth? - The Planted Tank Forum
 
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post #1 of 9 (permalink) Old 03-14-2005, 05:42 PM Thread Starter
 
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Does high bioload effect plant growth?

Hi,
I was wondering if a heavily stocked aquarium would hinder plant growth. Ive got a 8 discus and 8 roselines in a 100g and they are producing alot of wastes.
Thanks.
-Ray
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post #2 of 9 (permalink) Old 03-14-2005, 06:20 PM
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No. LOL! I had a 75 with around a dozen angelfish, several dozen assorted tetras (probably 50 all together), a rainbow shark, and 4 clown loaches. My fertilization included Ferroplant and Florapride. Lighting was 2-40 watt chroma 50s (Originally, I also had the striplight that came with the tank loaded with a 40 watt plant and aquarium bulb to balance the appearance but the strip died). Swords grew lush and thick (not exceptionally tall mind you but a veritable green carpet half-way up the tank). Cabomba and ludwegia would reach the surface, though their stems would rot and they'd have to be replanted. Very little algae, and it was only the common green stuff that the shark would eat.

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post #3 of 9 (permalink) Old 03-14-2005, 06:29 PM
 
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fish produce nitrates through ammonia, so the more fish, the more no3 is produced. not necessairily a bad think, just means you just have to dose less.
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post #4 of 9 (permalink) Old 03-14-2005, 06:39 PM Thread Starter
 
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Does dissolved organics effect plant life? Im constantly getting a protein slick on my water surface before my DIY extractor was working.
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post #5 of 9 (permalink) Old 03-14-2005, 06:43 PM
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I had the same kind of thing in my tank. I was always told that this is especially apparent in newly setup tanks, as was in my case. I never knew that it was a "protein" slick, I just thought it was caused from not enough circulation. I hooked up a powerhead to lightly skim the surface and problem was solved. The only bad thing I can see from this "film" or "slick" is it reflects some of the light off the surface of the water, preventing it from reaching the plants, so this is obviously not a good thing.

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post #6 of 9 (permalink) Old 03-14-2005, 06:47 PM
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Don't know the answer, I guess not. I am sure it will affect fish before it affect plant growth significantly though.


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I will do aquascapes after I collect all the plant species and grow them to perfection.
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post #7 of 9 (permalink) Old 03-14-2005, 07:26 PM
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I'm just a shade over 1 fish per gallon in my tank . I've never actually had a slick on my tank top. I guess there must still be enough turbulance, though it doesn't seem like much to me. I started up with an EI based approach about 1-2 months ago. My fish wastes and my NO3 usage seem to be in perfect balance. So, I add no KNO3 during the week and add my 50% water change, I typically find my NO3 levels at 50% of my target, so I only add KNO3 on water changes. As I do 50% weekly water changes (at least 50% of the time ), I'm not sure the TDS would climb that high. So, no real insights on that portion of the question.

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post #8 of 9 (permalink) Old 03-14-2005, 08:03 PM
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High bioload only serves to help plant growth by supplying more mulm in the substrate packed full of organic compounds which are then broken down by bacterium releasing CO2 (or DOC) and more available nutrients to the plants.

The scum on the tank surface is a biofilm consisting of bacteria, protozoa and algae. This forms more because of a lack of surface agitation rather than becuase of "bad" conditions. Bacteria like to form in numbers on surfaces (the reason why filter media has an immense surface area to volume ratio), and the water top is just another one of these surfaces.
The biofilm is harmless and if anything, helps to break down compounds in the ecosystem (especially the more natural ones). If you want to remove it, slight surface agitation is the best way.


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post #9 of 9 (permalink) Old 03-15-2005, 03:44 PM
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Quote:
Originally Posted by Stu
The biofilm is harmless and if anything, helps to break down compounds in the ecosystem (especially the more natural ones). If you want to remove it, slight surface agitation is the best way.

Wich can be easily acomplished by adding a molly or platy to the tank
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