bacteria not in sump

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ekd16y5

Feeder Fish
MFK Member
May 12, 2013
16
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Sydney
All the bacteria seems to be in the gravel of my 150gallon tank and not in the sump.
I have cycled it twice and have to recycle everytime because I cleaned the gravel
Any help be much appreciated
 
Because everytime I cleaned to gravel their is ammonia spike
And I b have used old media to seed the tank and in a week or so the media is white im guessing bacteria died off
 
I had issues with water parameters after vaccuming gravel because I would just siphon water out of the aquarium, the tank was setup for years, so disrupted the gravel probably lost some beneficial bacteria or brung up some bad bbacteria. Someone else feel free to chime in. Added another filter with bio-media .
 
Well, maybe you could describe your tank and sump and how you handle water changes. So far, from 2 threads, I can determine that it's 150 gallons with 1" of gravel and that you have a sump.

What size is the sump?
What's in the sump?
Is the water going to the sump from the top of the tank or the bottom?
Are you dechlorinating the water and if so with what?
Are you adding dechlorinator before you add the water?
Are you adding the water to the sump or to the tank?

Under normal conditions, your bio media is on the sump and most of your BB is there. Unless you are draining water from the bottom of the tank and have no or very little bio media in the sump, I am confused on how you could have most of your BB in the gravel.
 
I have a 3 foot sump with 3 chambers
1st chamber wool, sponge, jap mat and 10kg of matrix
2nd chamber has 6liter of k1 media which moves around nicely
3rd just has a pump which pumps the water back in
Water is comming from the top of the tank flowing down a weir and into the sump
Ive been using prime as a declorinator and adding into the water
Also doing the water changes from the tank not the sump
Since the spike been doing daily water changes 20 percent n prime to keep ammonia under control since i have fish n jus syphoning water from the top part of the tank
Hope that helps
 
It does. Thanks.

So, under normal situations (a cycled tank), most of your BB would be in your sump. The first chamber would be loaded as the sponge, jap mat and matrix would be well inhabited, and the mature K1 would have plenty.

I'm concerned that the seeded amount died off however. (I assume you were referring to the K1.) It makes wonder if most of the tank's BB was wiped out at some point. Have you been testing recently and if so are you getting 0 ammonia, 0 nitrite and 5-30 for nitrate?


Is it possible (since this is at work out of your control) that something happened out of your sight? Your tank is not over stocked, and you don't appear to be over feeding. No reason to have spikes unless some one else is feeding a lot (in your absence) or the BB was killed off.
 
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