cube and frag-sump system

Domi

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Hi all,

I am Dominik from Switzerland and new at reef2reef and thought I would start out with a build thread.
After having this 8 gallon tank for half a year:
IMG_3765.jpeg
I wanted to have something a little more stable, space for frags and some more tech.

So I planned out a new system and gave this to my tank-builder. It will be a cube with 45x50x40 cm (~18x19x16") that is connected to a sump 40x45x40 cm (~16x17x16") that will also serve as a frag tank with an ATO reservoir in the back. Below the sump there is some space for Dosing pumps and electronics.
IMG_3773.jpeg

The scape will move in the next tank as it is now, with the same live stock. I like the scape and just want it to have some more space.
I will probably add some corals and some fish. Right now I have mostly sps and lps corals one fire shrimp, one cleaner shrimp and a tail splot blenny called Fridolin. Also in future the focus will be on (sps-) corals
My goal is to have more water volume since keeping alk stable was always difficult since consumption was changing a lot on a day to day basis making it cumbersome with the dosing pump. The goal is that I can leave the tank alone for at least one week without the need for somebody to take care of it.
All in all the volume should be around 4 times more than before hopefully making it more stable.

That's the equipment I will use:
1x Juwel 100W heater
1x Dennerle 50W heater
1x AI Prime HD
1x Tunze turbelle nanostream electronic
1x Aqua medic DC runner evo
1x Aqua medic reef doser evo 4
1x Tunze osmolator nano
1x Cheap Dennerle LED light for frag tank
1x DIY aquarium controller
1x PC fan controlled by aquarium controller


I won't use a skimmer as I am always having troubles with too low nutrients, this gives me more space for coral frags in the sump. I plan to run activated carbon from time to time as I observed that sometimes growth would stall which I was able to solve with activated carbon, I assume it is because of toxins from the corals causing problems in such little volume.

The overflow tubing will be 25mm and the return tubing 20mm. I will hard-plumb everything and also try to fit a small manifold to be able to also run a small DIY carbon reactor and whatever else I might want to run from just the one return pump. I opted for a rather powerful return pump for this tank to get some flow out of it and to run it on a slow level hoping that it will be more quiet and last longer than maxing out a smaller pump.

Most of the parts I used already in the small tank, like for example my DIY aquarium controller based on an raspberry pi:
IMG_3502.jpeg

The dosing system will be ATI nano essentials, I am using this right now and I am quite happy with it. It has two parts so I have two free channels left on the dosing pump in case I want to add something else.

One thing I am thinking about at the moment is how to make the shelf below the sump save/waterproof/humidity-proof enough to have all the electronics in there. Any suggestions?
Additionally I am wondering if I should run the frag tank light at night to keep pH more stable, or does this only make sense with refugiums?

As I am changing my job I have one month of holidays before I start again in January, so my plan is to finish the majority of this build before Christmas and have it run already stable enough so I can visit my parents back in Austria for a couple of days.
I will update as I go along.

Cheers,
Dominik
 

James M

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Welcome to reef2reef!!!
Your plan sounds great. How many gallons will the new tank be ?
 
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Domi

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Welcome to reef2reef!!!
Your plan sounds great. How many gallons will the new tank be ?

Thanks!
The display tank will be around 20 gallons and the sump/frag-tank around 10 gallons. So all together 30 gallons. I hope this is enough for some stability. I just love small set-ups.
 
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Domi

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Since I still have to wait for the tank and stand to be shipped I entertained myself by building an acrylic stand for the dosing pump.
IMG_3778.jpeg IMG_3784.jpeg

And I bought fittings and tubes for the plumbing. I hope everything fits in this tiny space.
IMG_3795.jpeg
 
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Domi

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Hi everyone,

Live got very busy the last months so I neglected this built thread. Therefore I will come directly with the end result.
The built went smooth, I just had a cyano problem for about 2 months. I removed the sand and started dosing PO4 and NO3 which solved the problem. I added sand again one week ago and so far it is still cyano free, I keep my fingers crossed that it stays like that. The tank really needs a lot of nutrients, I am feeding 6 times a day and dose 0.75mg/l NO3 and 0.05mg/l PO4 per day, still NO3 is only at 2 mg/l and PO4 is 0. I still don't have a skimmer nor any other filtration or algae, so I assume that the corals are taking up a lot plus bacteria. Still, I am puzzled by this high consumption, does anyone have similar consumption rates? I am dosing ATI Essentials Pro and my alkalinity consumption is about 0.8 dKH/day.
My fish stock is at the moment:
2x Chromis
1x Purple Firefish
1x Tail Spot Blenny

I also added an AI hydra 26HD to have more light and better coverage and a Nero5 since the other pump was too loud for my liking.
That's how the whole thing looks:
IMG_4024.jpeg IMG_4022.jpeg

The display tank:
IMG_4019.jpeg IMG_4021.jpeg

The frag tank/sump, quite empty at the moment:
IMG_4026.jpeg

The dosing compartment:
IMG_4025.jpeg

And all the electric stuff, controlled by a raspberry pi:
IMG_4027.jpeg

Cheers,
Dominik
 
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Domi

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Hi,

It is time for an update, everything is growing well, the only thing I don't like is that there are quite some particles floating around. Also adding a filter sock did not solve that. I will maybe try hanging a filter in the display tank for a couple of hours to polish it up from time to time.

DSC06608.jpg
DSC06614s.jpg


Cheers,
Dominik
 
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Domi

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Hi all,

Quarantine means some more time for taking pictures so here is an update.
Things are running smoothly, once a week glass cleaning, filter wool exchange and Alk testing. Every third week I fill up the ATO reservoir and adjust salinity as well as test Ca, PO4 and NO3. That's all I do on the tank in months. Quite boring, but it seems like the corals like it boring...
So here are the pictures:

Display tank:
DSC07088_2.jpg


Shot of the full system:
DSC07093_2.jpg


And the engine room / frag tank
DSC07090_2.jpg


Cheers,
Domi
 
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Domi

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Hi all,

For friends of moving pictures I made a video showing the tank and setup:


Enjoy!

Cheers,
Dominik
 

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