Author Topic: Biggest Mistake  (Read 2414 times)

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Offline mattrox

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Re: Biggest Mistake
« Reply #15 on: December 02, 2011, 06:55:36 PM »
On a small water change you really only need to dose for the amount replaced.

I dose for the whole tank for any water change of ~30% or more.

Offline Oblivion

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Re: Biggest Mistake
« Reply #16 on: December 02, 2011, 07:00:15 PM »
I won't say what I do because if someone did what I did and lost fish I wouldn't want that resposibility.

I can say I dose for the whole tank at the chloramine rate before water goes in. I think Adelaide water is steralized with chloramines so just "ageing" water in a container won't get rid of the chlorine. I would also advise not to put water from a hot water tap ( cold/hot mix etc)  straight out of the tap. Most hot water pipes in existing houses have copper piping. Copper in small amounts can get into hot water. That is something I won't risk, just because I don't know the levels coming out the hot tap.

I leave all filters running. I only stop them when I service them.

Dechloinator will work in stoichiometric amounts.... Which means you only really need to dose for the amount of water going in. But it does no harm to dose bit more.

so you think the 10% hot water just to take the chill off the 90% qty of cold water isnt good...
i would have thought the temp drop from 100% cold water wouldnt be good, especially when your heaters then work to raise it back up a few hr later?

(edit not arguing or disagreeing, just interested in your views)
« Last Edit: December 02, 2011, 07:03:48 PM by Oblivion »

Offline -simon-

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Re: Biggest Mistake
« Reply #17 on: December 02, 2011, 07:18:46 PM »
There isnt many chemicals in Tassies water, I just use tap water on my aquaponic system and nothing else, fish are fine plants are fine no problem.

Offline mattrox

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Re: Biggest Mistake
« Reply #18 on: December 02, 2011, 07:40:03 PM »
The temperature drop is an average of the 2 water temperatures.

So for 25% pwc at 14 degree water in winter.

Final temp = 0.25*14 + 0.75*25
= 22.25  
 If it were an instant change then it would shock the fish, but it you trickle it slowly the heater kicks in.

And 2 10% water changes a week can be done if it is really cold.
Ft=0.1*12+0.90*25
=23.7

If you have 18 degree water

=0.25*18+0.75*25
= 23.25 that is hardly a drop at all, and 18 degree water is still cold to touch.

Mixing hot water sounds good in theory, but the truth is you don't know how much hot water you are using. I just like to rule out unknowns.

The best way is to have a barrel, fill it with water and dechlorinate it and have a heater in it. You only really have to heat it to 20 degrees. Use a pump to pump it into tanks. Barrel can be in an out of the way place and run a hose to your tank.


Offline SpangledPerch

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Re: Biggest Mistake
« Reply #19 on: December 04, 2011, 06:37:45 AM »
Woke up to another 12 or so dead :(
Africans and natives :)

Offline dogboy

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Re: Biggest Mistake
« Reply #20 on: December 04, 2011, 06:55:22 AM »
sorry to hear that mate, we have all been there, not a fun place.  :wah:
Tanganyikan addict

Offline mattrox

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Re: Biggest Mistake
« Reply #21 on: December 04, 2011, 09:47:27 AM »
That sucks. Sorry to hear that.

Offline SpangledPerch

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Re: Biggest Mistake
« Reply #22 on: December 04, 2011, 03:08:52 PM »
Good learning curve, ill hopefully never forget to add the "stuff" now

I used to use rainwater all the time, then because of the ease of just using a hose was there,   that was my weakness.

Thanks guys and girls
Africans and natives :)

Offline Oblivion

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Re: Biggest Mistake
« Reply #23 on: December 04, 2011, 03:49:27 PM »
my condolences for your loss.

im sure you lost many favourites.  :wah:

Offline SpangledPerch

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Re: Biggest Mistake
« Reply #24 on: December 04, 2011, 03:55:32 PM »
Every fish is  favourite,  oh well, shit happens  :wah:
Africans and natives :)