IBC system - Problem with falling leaves

rsevs3

You definitely don't want stones or anything else on the bottom of your tank. The IBC being square doesn't help Keith the removal of the waste. Your best bet is to try and get the water swirling and have your pump in the middle of the tank to suck it up.

Filling up your grow bed as high as it can will not be sufficient compensation for the number of fish you have though...

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ruikp

I've been reading and reading and reading... and I agree with you all that stated that I must have more GB. As I mention else where, I realised that the problem with AP is mantaining the fish healthy. And that is much more safe having an oversised GB volume. Don't know if I can manage that, don't got much space! Remember I got 40 5cm trout in my IBC. Soon my GB wont be enough to safely clear all the water. So I'm putting a low feed on my fish. Less feed, less pope, more chance of survive, until I put more GB or simple take off fish.

Another mistake I made, because I wanted the all thing running and didn't pay attention to the cycling period (actually, its a lot of reading, and that is a little bit desencouraging, specially couse I got a profession that I have to be reading and paying attention on numbers all the time) was that I've put the fingerlings 1 week after the beggining in the FT.

So, in order to the cycling don't kill my fish, and having no means of increasing GB at the moment, this is what I will do to try to go through this with no dead fish - please, correct me if I'm wrong:

1 - As stated, reduced feed to fish
2 - Try to change water from time to time. At the moment switching 2/3 of the water once a week. I haven't seen any abnormal behaviour in the trout, so I guess its fine for now - 2 week system now
3 - The nitrite spike comes around 2 to 6 weeks. So I probably will change the water often in this period. Maybe twice a week
4 - Fill up the GB with all I can in order to clear as much nutrients as possible
5 - Run on a continuous flow in order to try to decrease the cycling period
6 - Increase aeriation in FT in order to decrease the anaerobic space in GB due to continuous flow - correct me if I'm wrong, but nitrosomes and nitrobacter need oxygen, right? Think I've read it elsewhere
7 - Put stones from the place I've taken the trouts, in order for the water to have a bufered ph of the natural place of the trouts

There are other questions I want to talk about:
8 - Should I put a bio-filter in order to help? If so, where to put it - remember i got an IBC.
9 - About the pope, I was thinking of taking of the interfinal filtration of the pump (small sponge), in order to them to go to GB and not "use" the water oxygen needed for others (fish and bacterias)

And things I'm thinking at:
10 - My oxygenation is, for now, the coming back of the GB. I've cut the GB below drain a bit in order to the returning water put more oxygen in the FT - the higher the fall, it seems to put more bubbles in water/more oxygen. But I'm going to try something, when I got the time. It could function like a Refrigeration Tower. I've got some hot days where I live. So, I will need to cool the water in hoter days for my trout. What one need to do is to split the down flow in small water droplets in order to increase the area so the air can cool them more. It can be done by putting an obstacle right bellow the falling water (say a solid circumference of some material), the more away from the water surface in order to the small droplets have more fall, decreasing more the temperature. Before I check this, anyone got it already?

Big text... hope you bother looking at!

PS: Why no moderator let me have photos? I'm waiting for more than a week now...

BNDYBEAR

Mate sounds like you jumped in head first like a few
My first point would be the gb to fish stock which is really all that matters when trying to keep fish alive!
Not sure what climate you live in since I don't get that sort of info when on my phone. However unless you live somewhere in tasmania or a similar climate trout are not a 1 year or more grow out more like a 6-9 month from efingerling plate.

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Charlie

ruikp wrote:

PS: Why no moderator let me have photos? I'm waiting for more than a week now...

Just upload your pics into the post, instead of your album.

Ive done these ones for you.

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ruikp

But how do I do it? It always asks an internet path, which I haven't! Send me PM if easier.

ruikp

OK, I've seen it, its outside the post reply table, that's why I didn't saw it before. The Mod's can delete this msg and my last, there is no info about the subject in it.

ruikp

Passed through the nitrite peek with 13 deaths. I now know that I had 70 trout fingerlings, nt 40 as I supposed!
Then I had 3 days without deaths, so I guessed the nitrites going down with uping the nitrate.
But 3 days ago, we had the beggining of a heat wave coming from Africa. Today we had 40 degrees for several hours and little less yesterday. The result: 70 dead trouts...

Wasted hours... pour trouts...

Thinking of how to continue through the summer, probably fishless. What should I use as a fertilizer? Urea? Ammonium nitrate?

Urea is a slow release of NH3, so I think I woud go with Ammonium nitrate.

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