Mold in the gravel? - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 03-07-2012, 04:28 AM Thread Starter
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Mold in the gravel?

I recently setup my 75g tank with Timberline potting soil (1") from Lowe's and capped it with pea gravel that came with the tank but looks like to come from Lowe's as well. I have 4 pieces of "driftwood" that I got from a cichlid breeder when i bought the tank. Tank was setup about 2 weeks ago and I immediately added a bunch of hornwort and a few other plants. About 2 days ago I noticed what looks like to be mold in a few spots under the gravel.

My stock so far consists of
5 german rams (added 1 day after tank was setup)
9 otocinclus (added less than a week ago)
21 glowlight tetra (added less than a week ago)
5 synodontis zebra catfish (added 2 days ago)

Possible causes?
- "the driftwood", it seems kind of soft and very dark compared to driftwood ive seem on the internet (I've never owned driftwood before), so maybe its decaying?
- the gravel, maybe i didnt clean the gravel enough. When i first got the tank, the gravel was still in there with the driftwood and a little of old smelly water

I need any help possible!

pics of the mold on the front of the tank




right side of the tank



heres how it looked before
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post #2 of 8 (permalink) Old 03-07-2012, 04:34 AM
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That's cyanobacterio. Sometimes called bluegreen algae. I used to have it in a 20gallon tank when I was a kid but I never could figure out how to get rid of it. Than I had it in a 55gallon fowlr saltwater tank that is still running today. I couldn't get rid of it either time but luckily t just went away on its own in the 55. Google search or search this forum for cyano algae or cyanobacteria and see what you get.


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post #3 of 8 (permalink) Old 03-07-2012, 04:44 AM Thread Starter
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THANKS SO MUCH! atleast now i know what it is, and i can research on how to get rid of it!
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post #4 of 8 (permalink) Old 03-07-2012, 04:59 AM
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Yep, some advice I got in the past:

Increase water flow
decrease feeding
decrease fish stocking or waste
vacuum gravel and remove excess waste
change water with RO water (may not be necessary)
run phosban in your filter to remove excess phosphates
Change out old bulbs if you need to

These are just some common suggestions and I would think that a combination of these things would help rid you of the bacteria. This stuff isn't harmful but it is a sign that your water quality isn't as pristine as it could be! Good luck and just be consistent in your battles with this stuff.


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post #5 of 8 (permalink) Old 03-07-2012, 09:36 AM
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take a syringe with peroxide in it and inject in gravel along glass
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post #6 of 8 (permalink) Old 03-07-2012, 10:47 AM
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i got rid of mine with
3 day total blackout
added an aerator.

after the blackout, they're gone-ish. 2 days later, they start to come back.
then i put in the aerator (increase O2 and more water flow), and they're gone for good.


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Solution to ALL ALGAE Problem: Flying Fox!
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post #7 of 8 (permalink) Old 03-07-2012, 01:26 PM
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The problem may be the bio load. Unless you added seeded filter material or something along those lines then you have a fairly large amount of fish in a newly setup, uncycled tank. Have you tested your water parameters for ammonia, nitrite and nitrate?
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post #8 of 8 (permalink) Old 03-10-2012, 07:19 PM Thread Starter
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i ended up sticking an airstone in each spot and let it run for 24hrs. i havent seen anything since but i have been sparing on the feedings too.

wendyjo - i did add a lot of mulm from my 55g (that was running for several months) when i first setup up the 75g. my test strips dont show ammonia but my nitrites and nitrates have always been 0.
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