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Journal ADA 60F - Sensei Stone Shrimp Tank

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Jan 8, 2026
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Location
Virginia, USA
Tank: ADA 60F (60 cm x 30 cm x 25 cm) - 10.8 gallons

Lighting: Chihiros WRGB II Slim

Hardscape: Sensei Stone (Magura sandstone, with quartz and feldspar). GH, KH, pH neutral

Substrate: Crushed lava stone (to support hardscape), AF Lava Soil, and maybe Controsoil Extra fine? Still deciding

Filter: Oase Filtosmart 100 with Jardli 12/16 glass lily pipes (modified intake for shrimp)

CO2: GLA GRO Cartridge (once it is in stock)

Primary plants:

  • Eleocharis pusilla
  • Micranthemum tweedii ‘Monte Carlo’
  • Hemianthus callitrichoides (HC) 'Cuba
  • Staurogyne repens
  • Gratiola viscidula
  • Riccardia Chamedryfolia
  • +/- Myriophyllum guyana

Livestock: Neocaridina Ocean Blue; maybe +/- a few Least Rasbora (Boraras urophthalmoides)

Still in the idea/planning stage of this tank. For a challenge I am pushing myself outside of my own comfort zone here, so this will be entirely new territory for me. Modern Iwagumi/diorama is not something I thought I would want to try, but my interest has grown in recent months, so why not give it a try? It will work, or it won’t. If it doesn’t work it’s always an excuse to rescape.

I have an ADA 60F tank sitting on my kitchen counter.

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It was the first tank I purchased when I dunked my toes back into the hobby last year, that I scaped with some Ancient stone and driftwood for a few shrimp.

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Once it was planted I quickly got in over my head on too many stems in the back, and moss growing too well on the rocks to maintain in a short, cramped space, and had some persistent CO2 related algae courtesy of a drifting needle valve. Thinking about rescaping the tank I had started to tear it down last week, removing most of the stems, and then found myself needing a temporary grow-out tank for some minnow fry, so the tank won’t be fully torn down and scaped for a few more weeks yet, but that gives me time to play around.

So, with an eye toward some sort of modern Iwagumi/diorama, I needed some hardscape. Without the luxury of walking into a store that caters to aquascapers, I am usually stuck with buying hardscape sight unseen. Rather than have a plan, and then try to find the materials, I ordered some rock to see what I would end up with, and let the hardscape inspire me.

Enter 55 lbs of Sensei stone in assorted shapes and sizes.

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Why Sensei stone? I didn’t want to use Seiryu. It’s beautiful, easy to work with, and readily available, but I really needed this rock to be inert. Something in this tank’s original build sent GH and KH through the roof, and it had to be either the Controsand, or the or the ‘Ancient stone’ or both. I should have tested it in water first, and I learned that lesson the hard way. The 60F is a small and shallow tank, and shrimp loathe parameter swings, so this time I want to be able to control the water parameters a little more easily (especially the Ca/Mg ratios), so I am starting with inert rocks. Also, in case I wasn’t thrilled with the stones sent to me, I still wanted rocks that were easy to break into usable pieces, so no Hakkai stone this time. I did consider Frodo stone, but would like to use that in at least a 90P. So, hammer and cold chisel at the ready, Sensei turns out to have been a good choice.

The majority of the rocks were interesting either in color or texture, and reasonable in scale for a tank this size.

I did a quick speed-scape on Saturday afternoon with the majority of the larger stones, more for fit, and quickly ruled out some particularly chonky rocks. Thankfully, I saved the lid from the 60F tank when I ordered it, so it is currently my temporary dojo for now. I seriously need to build a real one, it is difficult to get much height in a cardboard lid!

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My phone doesn't do it justice here, but Sensei has some interesting character, with neutral greys, and warmer tones that run throughout the rock due to insoluble iron deposits. I think it’s pretty flexible in that it is easy to pair with a variety of sands or soils quite easily. I could use something like WIO Rocket sand to bring out the greys, or Colorado sand to accentuate the warm reddish brown tones. For playing around purposes I just opened an extra bag of La Plata from the 150 build.

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Not the all stone was well suited for use in a tank this size, though. That large stone center top in the image above is at least as thick as it is wide, and WAY too beefy and blocky to be useful, even if this was a 90P. Too many like that, and there would be no need for plants at all. It’s always difficult wanting to smash something you just purchased, but this morning I took a deep breath, and unleashed a hammer and cold chisel (honestly just the hammer works pretty darned well with with the strata in this stone) to see what I would end up with. Worse case scenario, I will end up with some accent gravel, because Sensei is difficult to match in color and texture with the accent gravels I have see out there.

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What do you know…smashing it worked pretty well, and I much prefer the shards that I broke off that blocky rock. Much more pointy potential there. There are a couple of other odd shaped stones I would be willing to resculpt into a more useable shape, too. It is actually quite fun bashing rocks with a hammer first thing on a Monday morning. I am now looking forward to playing around some more with these rocks, and seeing if I can up the drama a bit. We’ll see what I ultimately end up with. I don’t think the shrimp will mind too much regardless.
 

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