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Quietelk's Cade 900 S2 Mixed Reef

900 x 600 x 600 system by CADE, mixed reef, about 18 months old, combination of new stock and fish/coral/rock from a system that was about five years old. My third large tank.
Introduction
Aussie reefer here. My first tank was set up in 2003 and I've been in the hobby since. This is my third large tank, with a couple of little "placeholder" tanks inbetween my original 4'x18"x18", my first 3'x3'x2', and this Cade system.

I've always run mixed reefs and tried to go for as natural a look as possible. I started with T8 "full spectrum" fluoros, moved on to T5s, dabbled briefly with MH (until the power bills came in) and was an early LED adopter with a super complex Vertex Illumina pendant that used internal wireless and used to break down all. the. time.

I took a break from 2012-2017 and then saw how much cheaper (to run) lighting had become so dove back in with a little 500mm cube. I might have been satisfied with this but the dang tank sprang a massive leak and I had to find an emergency replacement. This was a 900x450x450 generic tank which I kept for a couple of years until it just got too cramped and overgrown.

In 2024 I took the plunge and ordered a Cade 900 S2. So as a tank it's only 18 months old, but it has a lot of rock, coral, and fish in it that are approaching eight or nine years, including my large black Occelaris clown and my hawkfish, who both joined the 500mm cube in 2017.

After an early phosphate disaster and a recent shrimpocalypse caused by a floor-resurfacing company, the tank is now finally starting to enter its "early mature" stage and put on some serious coral growth. Xenia remains a problem...
900 x 600 x 600 system by CADE, mixed reef, about 18 months old, combination of new stock and fish/coral/rock from a system that was about five years old. My third large tank.

Aquarium Profile and Equipment

What type of saltwater aquarium is this?
Mixed Reef
Total Water Volume
98
When did you start this tank?
Aug 1, 2024
What is your aquarium made of?
Glass
Aquarium Length (inches)
36
Aquarium Width (inches)
24
Aquarium Height (inches)
24
Aquarium Overflow/Drain
Internal Overflow
Aquarium Sump
YES
Sump Water Volume
13
Aquarium Stand
This is a CADE 900 S2 so the stand is a combination of aluminium and glass. It's the primary reason I went with CADE as my previous tank had a wooden stand which took massive water damage in just two years.
Aquarium Controller
NO
Protein Skimmer
YES
Protein Skimmer Make and Model
NYOS Quantum 120
Aquarium Reactors
  1. None
Return Pump
SICCE Syncra SDC 6.0
What types of equipment are you using for water flow and circulation?
  1. Wavemaker
Water Flow and Circulation Equipment List
AI Nero 5 x1
AI Nero 7 x1
Maxspect Gyre 300 x2
Aquarium Lighting
  1. LED
Lighting Equipment List
2x Dalua Illumagic X4
Lighting PAR and Goals
After five years with AI products I'm less interested in PAR and more in having lights that don't burn out their own lenses 🤣. I had two AI Primes (one was for a sump) where the fans conked out and the lights stopped working. I had one AI Hydra 32HD where the power supply stopped working. And my previous dual 32HD setup saw both lights burn out their lenses to the point of the plastic melting and dripping into the tank.

The X4s were expensive but the fans are much quieter and after 18 months of use the lenses still look crystal clear.

I run the X4s using an SPS profile that ramps them up really high in the middle of the day and then tapers off quite blue for the evening. The photos here are taken under a pure white profile I set up for photography since trying to take pics under the blue is impossible.

Basically they seem to be growing the coral really well. The big blue SPS that's the "queen" of the tank in particular puts out really thick sticks.
Dosing Equipment
  1. Other
Dosing Equipment Detail
I'm using Red Sea's four part dosing system and their four channel dosing pump. I've been on that for a year or so now and it has made a huge difference to the tank. I just set and forget. I still do water changes but I'm not sure it's even necessary.
Auto Top Off or ATO
YES
Aquarium Heating and Cooling
  1. I am using a heater or heaters
Water Temperature
25
Heating and Cooling Equipment Detail
Just a single 300W Eheim heater is sufficient for this water volume where I live. I have ducted AC in the house so in summer I just leave the AC set to 25C and the tank never needs chilling.
Additional Equipment Detail
I use a RedSea Reefmat 250 which, along with LED lighting that doesn't cost a billion dollars a year, has made it possible for me to stay in the hobby all these years. I remember in 2003 getting up at 2am to go fiddle with the filter wool wrapped around my overflow pipe to stop that dang trickle...

For the previous tank I ran without physical media for a while. It was fine but obviously a LOT of stuff built up in the sump.

Now these reef mats are just a revelation. Not only do they last months, they pull the goop up out of the water!

Aquarium Water Chemistry and Parameters

Salt Brand
As an Aussie in or near Sydney I have the luxury of new salt water on tap, as it were.
Trace Element Dosing
I'm using RedSea's four part system. It's going well.

Aquarium Natural and Mechanical Filtration

Substrate
Sand
Substrate Level
Shallow
Live Rock Type
Ocean-sourced.
Nutrient Export
  1. Protein Skimmer
  2. Filter Roller
Water Changes
YES
Water Change Details
The RedSea four part dosing system has made it way too easy to miss water changes. The tank is VERY stable now. Corals are extended, fish look great... I'm actually nervous doing water changes these days. I do one about once a month.

Aquarium Tank Inhabitants (fish, coral, invert etc.)

Fish List
  1. Angelfish
  2. Butterflyfish
  3. Clownfish
  4. Goby
  5. Hawkfish
  6. Surgeonfish Tang
Total Fish
Over the last seven years I've settled on a "team" that seems very stable.

3x black and white Occelaris clown
2x Skunk clown (pair)
1x Falco Hawkfish
1x Coral Beauty
1x Two-bar Rabbitfish
1x Klein's Butterfly
1x Five-lined Coral Goby
1x Yellow Coris Wrasse

The Butterfly and Rabbitfish mean I can't keep anemones (and zoos have to hide in crevices and awkward spots) but they also mean there are no aiptasia anywhere in the tank.
Coral List
  1. SPS Coral
  2. LPS Coral
  3. Zoanthids
  4. Mushroom Coral
Total Corals
20
Invert List
  1. Crabs
  2. Starfish
  3. Snails
Total Inverts
100
Livestock Detail
This tank relies heavily on a massive CUC of what we Aussies call periwinkles but which I think are a type of small turbo snail? I have more than 100 at any one time, a mix of maybe 30+ adults and many dozens of smaller individuals, down to about the size of a pinhead. At night the glass is absolutely covered in them.

There are also two Strombs stolidly churning the sand, and I'm not sure if I still have some hermit crabs. I haven't seen one for a while but they have a lot of caves to explore.

There are maybe six or seven little starfish, and I was delighted to see a brittle-star's arms just the other night. I thought they were all long gone!
Livestock Quarantine
  1. No Quarantine
Favorite Fish
For all the limitations they put on what I can keep, the Butterfly and Rabbitfish are clearly high intelligent animals for their size. I love showing them especially to people who keep freshwater tanks.
Favorite Coral
The big blue acro is the "queen" of the tank, but next to it is a montipora that started as the tiniest little pink dot on a rock and is now the size of a saucer.
Favorite Invert
In our house the snails that come out at night are known as "the dudes". One of them is carrying an increasingly massive xenia garden on its shell,
Never Livestock
Mandarin dragonet. It's just not right.

Aquarium Nutrition (fish, coral, invert etc. feeding)

Fish Feeding Frequency
One Daily Feeding
Coral Feeding Frequency
One Daily Feeding
Fish and Coral Feeding
  1. Flake
  2. Frozen
Auto Feeder
NO

Additional Aquarium Information

What do you think are the keys to your success in reefing?
I always put "the system" over any individual. It's sad to lose a coral or a fish but sickly individuals are usualy a symptom of a broader problem, so that's where my focus has always gone.

I've always tried to make the aquascape look natural or plausible. I'm not a fan of the greengrocer-stacked-shelves look. I always ask myself does this look like a place where these animals LIVE, or just a place where they are on display?

Gumbies R Us

God, Bouldering, and Reefing
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Awesome looking corals in your tank!
 

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