Swedish fish - behind the scenes rebuilding a public aquarium

Sallstrom · Feb 12, 2020

Lights are go. Moon light is go

Lasse · Feb 12, 2020

I had a busy day - as I said yesterday

Sincerely Lasse

ksed · Feb 12, 2020

I see a pay raise coming soon

Lasse said:
I had a busy day - as I said yesterday

Sincerely Lasse

Sallstrom · Feb 13, 2020

Pump testing day. Unfortunately someone(that was me..

) ordered AC pumps instead of controllable DC pumps, so at the moment all stream pumps are just on/off. The controllable ones are on their way.
These AC pumps will keep the bottom clean from food hopefully. They blow water along the bottom under the egg crates.

najer · Feb 13, 2020

... and they will just keep running, love tunze pumps.

Brew12 · Feb 13, 2020

Sallstrom said:
Pump testing day. Unfortunately someone(that was me.. ) ordered AC pumps instead of controllable DC pumps, so at the moment all stream pumps are just on/off. The controllable ones are on their way.
These AC pumps will keep the bottom clean from food hopefully. They blow water along the bottom under the egg crates.

Could be worse. You could have ordered pneumatic pumps!

Brew12 · Feb 13, 2020

Question for the smart ones that hang out here about my CaRx. I know the rate that media dissolves is a function of pH. Does pressure play a role by chance? Could the media dissolve more slowly under 10psi than under 2psi?

Sallstrom · Feb 13, 2020

Brew12 said:
Question for the smart ones that hang out here about my CaRx. I know the rate that media dissolves is a function of pH. Does pressure play a role by chance? Could the media dissolve more slowly under 10psi than under 2psi?

I'm sure the partial pressure changes the solubility. But is it possible to raise the pressure in your CaRx? I've only worked with reactors with "open" line out, like an overflow back to the tank. More water or gas in, more water or gas out.

Sallstrom · Feb 13, 2020

Sallstrom said:
I'm sure the partial pressure changes the solubility. But is it possible to raise the pressure in your CaRx? I've only worked with reactors with "open" line out, like an overflow back to the tank. More water or gas in, more water or gas out.

Unless the outgoing tube is too small. I've tried that once, with a strong membran pump pumping in water. That CaRx started to leak. So I don't recommend putting a valve on the outgoing line

Brew12 · Feb 13, 2020

Sallstrom said:
Unless the outgoing tube is too small. I've tried that once, with a strong membran pump pumping in water. That CaRx started to leak. So I don't recommend putting a valve on the outgoing line

The reactor is set up to pump in, and use a "drip emitter" (fancy term for orifice) to restrict flow out. When I lowered pH in my CaRx it raised the pressure but out my output dKH and flow rates didn't change. I'm thinking it's likely the media just had easily dissolved fines that I didn't get rinsed out.
I have a new pump coming tomorrow which I will use to pull water through the reactor, so hopefully that works better. And, it will allow double the flow rate.

MabuyaQ · Feb 13, 2020

Brew12 said:
Could be worse. You could have ordered pneumatic pumps!

I'll do you one worse, they could have been women's shoes..

Sallstrom · Feb 14, 2020

Here’s the coral spawning experiment setup today. Three test corals moved in yesterday. Some Chaetomorpha too.
A bit high phosphate, for my taste, at the moment(0,21 ppm). So changing water with one coral system with low PO4 today.

najer · Feb 14, 2020

Very nice, how will you deal with light spill if this is going to be run Australia time or that not the plan?

Sallstrom · Feb 14, 2020

najer said:
Very nice, how will you deal with light spill if this is going to be run Australia time or that not the plan?

The upper tank will be covered on all sides to aviod any light from the other tanks and the sun to get into the upper tank in the experiment. Not sure on exactly how yet. Perhaps we'll end up filling all gaps with duct tape, but I hope we can find a better looking solution

One of the more important thing is the totally dark periods before and after moon light(researchers think so far), so we need to get it "light tight".

And we need to figure out what time it'll be on, so "spawning time" will be during the hours we are at the temporary Aquarium. The location we will try to resemble will probably be something like Lizard Island in Australia, since there are a great supply of data from there. But the tank won't go on Australian time, that will be adjusted so it fits our working hours.

crusso1993 · Feb 14, 2020

Sallstrom said:
Here’s the coral spawning experiment setup today. Three test corals moved in yesterday. Some Chaetomorpha too.
A bit high phosphate, for my taste, at the moment(0,21 ppm). So changing water with one coral system with low PO4 today.

Out of curiosity, what lights are you running on the Chaetomorpha?

Sallstrom · Feb 14, 2020

crusso1993 said:
Out of curiosity, what lights are you running on the Chaetomorpha?

That's LED bars from GHL, fresh water version, Mitras slimline. The moon light is also from GHL, Mitras simu-stick I think it's called.

crusso1993 · Feb 14, 2020

Sallstrom said:
That's LED bars from GHL, fresh water version, Mitras slimline. The moon light is also from GHL, Mitras simu-stick I think it's called.

Ahhh... I do not think those are available here in the US.

Lasse · Feb 14, 2020

No - the lunar light is Mitras Slimline RGB. The picture from the homepage show three separate colours for the RGB - but it is RGB LEDs in one fixture nowadays. o these you need an active splitter too - if you want to control them. We are going to use them for the lunar light (we can vary the K of it) - therefore we run it through the computer.

The refuge light is - as David - said Mitras Lightbar 2 - fresh water version. We run the on/off

I think you can order them in the US too - @Vinny@GHLUSA - correct me if I´m wrong

Sincerely Lasse