Backyard Aquaponics
A place to discuss aquaponics

I also salt the water in the bottles to bring the temperature right down. most freezers are set at around -18C if you put as much salt as the water can dissolve into the mix the freezing temp of the water/salt mix will reduce to -21C, so you may have to wind the freezer up a little more.

If you put a bottle of salty water in the fridge at -18 deg how the hell is it going to get to -21
Trying to cool a fish tank is a bit like peeing in it to heat it
I know a bloke who goes and buys ice so fish that would normally cost $5.00 to produce now cost $15.00

There are four things you can do cheep!
1. Add ice in two litre frozen milk bottles.
2. Put a fan on water maybe with a wet cloth on top of fish tank. Dip one end of cloth in water the other end suspended.
3. Submerge water in feed pipes, forcing the cold water from the bottom off fish tank to the top!
4.run pump 24/7. Increase water to grow beds by adding extensions to stem pipes or remove bell housing to cause flood and drain system,

The last one will save your fish but it could hurt your plants depending on what you have planted.

1 will work but its not exactly cheap and you need a lot of ice to make much of a difference.

2 Will help a bit but again you need a lot of evaporation to make a difference.

3 If this works at all it would only because the water in the tank is poorly mixed. Not a good situation at any time.

4 running the pump 24/7 during hot weather can actually drastically increase the temperature due to the heat exchange that occurs in other components like the media beds. Flooding the beds may increase evaporation but the sunlight being absorbed by the water could also drastically increase the heat gain of the system.

But I have done test Stuart. And all these worked for me! Now if you would like to add your own advice please go for it?

Maybe instead of trying badly to correct proven test you could try some advice off your own?

Or is that mathematically out off your reach?

Welcome back Blizzard...

Thankyou. Azira
Life has its ups and downs, but sometimes the needs off others outweighs the needs of the few.
Or in other words when I see a guy having problems raising Barra as I am doing it good. I feel the need to try and help, if I can.

Azira I think you missed the sarcasm emoticon

Blizzard you continue to continually think that contradictory opinions to your own is some form of persecution.

Your 3 point is particularly worrying for your fish and actually your system in general. If you do have stratification in your tank then you have done something seriously wrong. Takes my contradiction personally and ignore the advice and choose to take offence.

Alternatively maybe take a deep breath and admit the possibility that you don't really understand what you are talking about.

I was trying to be subtle.

Stuart. My system is only 1300ltrs. What I do wont work on your system and what you do wont work on my system! Mmm logic!!!!

My system is fine thanks! Other than that yabby incident! When I lost one goldfish.

I hand build my system the way I saw was the best for me. Its working the way I want it to, I don’t understand what you have against me other than I didn’t buy it from you? Or ask your permission or advice?

Sorry I am only new at this, I didn’t realize I had to kill all my fish and plants to qualify for posting on here? Did I mention I am growing Barramundi in Perth! Without a heater or a shade house! Outside in all weathers, I must be really bad at this aquaponics stuff! As I haven’t managed to kill all my fish as yet!

You missed Stuarts point about the water temperatures in your tank Blizzard (point 3).

In a 1300lt system there really shouldn't be any noticeable difference in temperatures in the bottom of the tank to the top, particularly not to the point that you could pump the 'cold' water around. In a small tank you should have more than enough circulation to even out the temperature throughout water column. So if it's the case that you DO in fact have an obvious temperature difference between the bottom and top of your tank, then there's a good chance something isn't right with your system.

If there is no obvious temperature difference in your tank, then it kind of renders your suggestion null and void. You needn't get defensive, just respond to the actual point; if you do have a water temperature difference, how do you, why you believe it is good and so on. If you don't, then perhaps simply say so and explain why you considered it a good suggestion for the OP.

No fuss, no muss.

The operative word in that statement was the word "IF".

I seriously doubt that in a 1300L system your flow rate is so low as to allow stratification to occur. Which means that adding circulation to move water from the top of the tank to the bottom and vice versa would do precisely nothing.

Basically my responses to your comments are not really directed at you at all. Rather they are to correct the information you offer. My hope is that other people who don't know any better will listen to me and not to you. Some will, some won't but in good conscience I will have done my best to help them. You on the other hand seem more wedded to your personal sense of grievance than actually to except advice with the good grace with which it is offered even when you disagree with it and even if you have no intention of following it.

Ignoring advice offered with good intentions is one thing being rude and insulting as a standard response is another.

What Azira said.

Respond to the ideas, critique the logic, defend your point of view with explanations and considered responses. Attacking the people in any sort of discussion or debate gains you nothing.

Oh dear, we've been through this...