Question about using no bio media and algae

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brianhellno

Feeder Fish
MFK Member
Nov 30, 2008
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It seems some don't feel biological media is as necessary as made out to be or that it might not even be necessary at all. I've thought about this and the following questions came to mind. I'm not sure if I'm on track or not but hopefully I can get some answers to some of my questions or at the very least get some input.

Let's say you decide to use no bio media for your tank. Let's say you decide to use a bare bottom setup so its easier to keep clean. Basically at this point you have no decorations or substrate so your relying on the walls and bottom of the tank to house bacteria. You have a power head in the tank for circulation and your stocked properly.

Now given these circumstances, let's say algae begins to grow on the bottom and sides of the tank after a successful cycle. The questions are:

Does the algae snuff out the biological bacteria on the surfaces of the tank?

Does the algae do a better or a worse job than the biological bacteria in the nitrification cycle?

If the algae layers itself and starts to die producing ammonia would the system handle the added load? Or would you have to constantly keep the algae in check so that doesn't happen?

If the algae does snuff out the biological bacteria and every time you perform a water change, before you change the water you scrape all the algae off of the sides of the tank so it's cleaned up during the water change do you have to go through another cycle every time?

I'm just curious as to what role algae would play in this scenario. Because if algae can disrupt biological bacteria or even out compete it for nutrients then I'm leaning towards biological media as kind of a safe house for biological bacteria being somewhat necessary to prevent these possibilities from happening.

I understand that biological media never existed at one point and things worked out just fine but the way I see it cars never had seat belts at one point and things worked out just fine too until a wreck. I'm starting to feel like bio media is the seat belt in our fish keeping equation and that even though it might not be absolutely necessary your still better off using it.
 
Who is saying bio-media is not needed at all? Other than in a reef tank with live sand, live rock, and a big skimmer I can't imagine what you are talking about. And such a setup isn't possible in freshwater. Please explain.
 
bio is a necessary part of filtration, the recent debates on here have been about the amount that people use and not if its needed.
i believe that the amounts used are not needed nor is media bought especially for the purpose. your mech filtration, ie sponges, will do so long as it is rinsed in tank water.

contrary to your last para; biological media has always existed, even in the days of under gravel filters and sponge filters. just because it isnt called "biological media" doesnt mean it isnt.
 
Bio or beneficial bacteria grows in your filter as well, not just the tank. If you have a barebottom tank with no decorations and just fish, your bb will be in your filter.

If the tank is healthy and not in direct sunlight, you shouldn't have to worry about algae much, if at all.
 
no filter+barebottom+fish=fail


i doubt the algae kills bacteria, but scraping the sides during water change would remove most of the bacteria on the walls.
 
brianhellno;3676170; said:
Let's say you decide to use no bio media for your tank. Let's say you decide to use a bare bottom setup so its easier to keep clean. Basically at this point you have no decorations or substrate so your relying on the walls and bottom of the tank to house bacteria. You have a power head in the tank for circulation and your stocked properly.
So no filter at all? Just the powerhead for circulation?
 
fishbum;3676659; said:
So no filter at all? Just the powerhead for circulation?


thats just a big box of water with a fish in it.... doing this makes you a crappy fish keeper so dont do it...



are you really asking or are you just trying to learn how stuff works...
 
chesterthehero;3677181; said:
thats just a big box of water with a fish in it.... doing this makes you a crappy fish keeper so dont do it...



are you really asking or are you just trying to learn how stuff works...
Me? No. I know you need a filter. But it apperars as if the OP is suggesting only using a power head and no filter.
 
fishbum;3677203; said:
Me? No. I know you need a filter. But it apperars as if the OP is suggesting only using a power head and no filter.
its doable but only with a light bioload.
if you try to do it barebottom, the bioload would have to be almost non-existant.
 
Your post is very interesting, in a number of ways.
One way, is the way some replies prove the old saying, “you see what you want to see”.
It also generated replies based on the “my mind is made up, don`t confuse me with facts” school of learning.
On a more important level it asks really good questions.

Can algae and nitrifying bacteria coexist on a given surface, or will one cancel the other out.

At what ppm can a bare tank remove/process ammonia down to a 0 level.

I have no fact based answers to either question.
I do know that up to a point, external bio media is not needed to handle ammonia in a tank that has enough surface areas for bacterial colonies.

Makes me wish I had a spare tank for a test.
Very interesting questions and would be a cool test to do.
Anybody up to the trying of these tests.

BTW:It still amazes me the heat a discussion on this subject can generate. In the fish keeping world, this is as hot a topic as abortion.
 
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