{"title":"Dennerle","description":"\u003cp\u003eDennerle – German quality for planted aquariums and shrimp tanks: CO2 systems, substrates, fertilizers and nano equipment.\u003c\/p\u003e","products":[{"product_id":"deponit-mix-black-10in1","title":"Dennerle Deponit-Mix Black 10in1 – Long-Term Nutrient Base","description":"\u003cp\u003eDennerle Deponit-Mix Black 10in1 is a high-quality nutrient substrate that supplies plants with vital minerals and trace elements for long-lasting, stable growth.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Dennerle","offers":[{"title":"4.8 kg","offer_id":51591652868426,"sku":"DEPONIT-MIX-BLACK-10IN1-4-8KG-1","price":26.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/3685\/5370\/files\/Dennerle_Deponit-Mix_Black_10in1.jpg?v=1768480064"},{"product_id":"crystal-quartz-gravel-diamond-black-1-2-mm-5-kg","title":"Crystal Quartz Gravel Diamond Black 1-2 mm (5 kg)","description":"\u003ch1\u003e\u003c\/h1\u003e\n\u003cp\u003eCrystal Quartz Gravel Diamond Black offers a high-quality 1-2 mm substrate that enhances aquarium aesthetics and fish colors. Its premium quartz material and deep black hue provide a clean, elegant foundation, easy to maintain for medium to large tanks.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Dennerle","offers":[{"title":"Default Title","offer_id":51591705624906,"sku":"CRYSTAL-QUARTZ-DIAMOND-BLACK-5KG","price":17.1,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/3685\/5370\/files\/3_1_98f0b18a-dde6-498e-b305-33461b2e0423.jpg?v=1768480065"},{"product_id":"nano-shrimp-gravel-sunda-white-0-7-1-2-mm-2-kg","title":"Nano Shrimp Gravel Sunda White 0.7-1.2 mm (2 kg)","description":"\u003ch1\u003e\u003c\/h1\u003e\n\u003cp\u003eNano Shrimp Gravel Sunda White is a fine, pure white substrate (0.7-1.2 mm) designed for nano shrimp tanks. Ideal for Sunda and freshwater shrimp, it supports healthy bacterial growth and creates a clean, bright environment. The 2 kg pack suits small to medium tanks, making maintenance easy while enhancing your shrimp’s natural beauty.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Dennerle","offers":[{"title":"Default Title","offer_id":51591736885578,"sku":"NANO-SHRIMP-GRAVEL-SUNDA-WHITE-2KG","price":10.43,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/3685\/5370\/files\/4_65f499b3-8490-41d8-b3d5-b4700c3f3e7a.jpg?v=1768480065"},{"product_id":"dennerle-corner-filter-40-corner-aquarium-filter","title":"Dennerle Corner Filter 40 – Corner Aquarium Filter","description":"\u003cp data-start=\"2952\" data-end=\"3179\"\u003eDennerle Corner Filter 40 is a compact and silent aquarium filter with a flow rate of 150 l\/h and only 2 W power consumption. Safe for shrimp and small fish thanks to the fine sponge and narrow slots.\u003c\/p\u003e\n\u003cp data-start=\"3181\" data-end=\"3216\"\u003e \u003c\/p\u003e","brand":"Dennerle","offers":[{"title":"Default Title","offer_id":52714837049674,"sku":null,"price":24.99,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/3685\/5370\/files\/7.jpg?v=1768480072"},{"product_id":"nano-hang-on-thermometer","title":"Nano Hang-On Thermometer","description":"\u003cp\u003eA compact aquarium thermometer that hangs on the glass. Provides accurate and reliable water temperature readings for nano and shrimp tanks.\u003c\/p\u003e","brand":"Dennerle","offers":[{"title":"Default Title","offer_id":52726336815434,"sku":"4001615056570","price":9.99,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/3685\/5370\/files\/8_1_a07c1fa2-4a02-4d2f-99a9-dc07b01cbd71.jpg?v=1768480064"},{"product_id":"nano-shrimp-gravel-arkansas-gray-2kg","title":"Nano Shrimp Gravel Arkansas Gray 0.7–1.2 mm – 2 kg Bag","description":"\u003cp\u003eNatural Arkansas Gray shrimp gravel 0.7–1.2 mm. Perfect for nano aquariums, shrimp tanks, and planted setups.\u003c\/p\u003e","brand":"Dennerle","offers":[{"title":"Default Title","offer_id":52726338060618,"sku":"4001615058574","price":10.43,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/3685\/5370\/files\/nano-shrimp-gravel-arkansas-gray-bag_Aquarium_Boutique.jpg?v=1768480073"},{"product_id":"dennerle-co2-quick-test","title":"Dennerle CO2 Quick Test","description":"\u003ch2\u003eDennerle CO2 Quick Test\u003c\/h2\u003e\n\u003cp\u003eThe Dennerle CO2 Quick Test is a fast, colorimetric spot-check kit that tells you, in a matter of seconds, whether your planted aquarium has enough dissolved CO2 for healthy plant growth. It's the simplest way to answer the question every aquascaper asks at some point: \"Is my CO2 actually doing anything?\"\u003c\/p\u003e\n\u003cp\u003eUnlike a permanent drop checker that sits in the tank monitoring CO2 continuously, this is a single-use, on-demand test — fill, shake, read, done. No calibration, no KH reference solutions, no waiting around.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Makes It Different\u003c\/h3\u003e\n\u003cp\u003eMost CO2 problems in planted tanks aren't dramatic — they're slow, quiet stunted growth or a creeping algae problem that nobody can quite explain. A permanent drop checker answers \"what was my CO2 doing over the last few hours,\" which is useful for trend-watching, but not for an immediate answer right now. The Dennerle CO2 Quick Test exists for that immediate answer: you want to know the CO2 level at this moment, not tomorrow.\u003c\/p\u003e\n\u003cp\u003eIt's also genuinely fast for a chemical test. There's no multi-hour equilibration like you get with a glass drop checker — you shake the sample and read the color within seconds.\u003c\/p\u003e\n\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eResult in seconds — no waiting for a drop checker to equilibrate\u003c\/li\u003e\n\u003cli\u003eFive-color scale gives a clear, immediate read of whether CO2 is too low, ideal, or too high\u003c\/li\u003e\n\u003cli\u003eNo KH (carbonate hardness) reference solution needed, unlike long-term drop checkers\u003c\/li\u003e\n\u003cli\u003eSimple shake-and-read procedure — no glassware to install, no suction cups\u003c\/li\u003e\n\u003cli\u003eDouble pack — two individual tests, so you can check at different points in the day or re-test after adjusting your CO2 system\u003c\/li\u003e\n\u003cli\u003eMade by Dennerle, a German aquarium technology brand with decades of experience in planted-tank equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow It Works\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFill the supplied test tube halfway with aquarium water\u003c\/li\u003e\n\u003cli\u003eClose the lid and shake until the reagent has fully dissolved\u003c\/li\u003e\n\u003cli\u003eCompare the resulting color against the included color chart\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eReading the Result\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlue\u003c\/strong\u003e — too little CO2, increase injection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlue-green\u003c\/strong\u003e — slightly low CO2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGreen\u003c\/strong\u003e — ideal CO2 level for plant growth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYellow-green\u003c\/strong\u003e — slightly high CO2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYellow\u003c\/strong\u003e — too much CO2, reduce injection; risk to fish\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTest method: colorimetric, 5-color comparison scale\u003c\/li\u003e\n\u003cli\u003eResult time: a few seconds after shaking\u003c\/li\u003e\n\u003cli\u003eContents: 2 individual quick tests\u003c\/li\u003e\n\u003cli\u003eWater type: freshwater only\u003c\/li\u003e\n\u003cli\u003eDoes not measure liquid carbon fertilizers (e.g. Carbo Elixir, Easy Carbo, Carbo Booster Max) — these contain organic carbon compounds, not dissolved CO2 gas, and will not register on this test\u003c\/li\u003e\n\u003cli\u003eVendor: Dennerle\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWho Should Use This\u003c\/h3\u003e\n\u003cp\u003eAnyone setting up a pressurized CO2 system for the first time and wanting to confirm the injection rate is actually landing in a safe, useful range. It's equally handy for experienced aquascapers doing periodic spot-checks, and for anyone troubleshooting stunted plants or a stubborn algae outbreak where CO2 is a suspect.\u003c\/p\u003e\n\n\u003ch3\u003eWhen and How to Test\u003c\/h3\u003e\n\u003cp\u003eTest roughly halfway through your lighting period, not first thing when the lights come on. CO2 tends to be highest in the early morning, before plants have had time to consume it through the day, and lowest by late afternoon after hours of photosynthesis have drawn it down. A mid-day reading gives a much more representative picture of what your plants are actually working with.\u003c\/p\u003e\n\n\u003ch3\u003eExpert Tip\u003c\/h3\u003e\n\u003cp\u003eUse this quick test as your first move when something looks off — stalled growth, new algae, fish gasping at the surface — before you start changing fertilizer dosing or lighting. It narrows down whether CO2 is even part of the problem in under a minute. For ongoing monitoring rather than one-off checks, pair it with a permanent drop checker that stays in the tank and gives you a continuous visual reference.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhen is the best time to test?\u003c\/strong\u003e Roughly halfway through your lighting period. CO2 is usually highest first thing in the morning and lowest by late afternoon, so a mid-day reading is the most representative.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this in a saltwater tank?\u003c\/strong\u003e No — it's designed for freshwater planted aquariums only.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this detect liquid carbon products like Easy Carbo or Carbo Elixir?\u003c\/strong\u003e No. Liquid carbon fertilizers contain organic carbon compounds rather than dissolved CO2 gas, so they won't register on this test.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many tests are in the box?\u003c\/strong\u003e Two individual tests, so you have a spare for a follow-up check.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to know my water's KH to use this?\u003c\/strong\u003e No — that's one of the advantages over a long-term drop checker, which needs a KH reference solution to work correctly.\u003c\/p\u003e\n\n\u003ch3\u003ePairs Well With\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDennerle CO2 Langzeittest Correct — for continuous, permanent CO2 monitoring alongside your spot-checks\u003c\/li\u003e\n\u003cli\u003eChihiros CO₂ Indicator — a glass drop checker for ongoing visual reference between quick tests\u003c\/li\u003e\n\u003cli\u003eCO2 Schlauch PRO 4\/6 mm tubing — gas-tight hose for your pressurized CO2 setup\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Dennerle","offers":[{"title":"Default Title","offer_id":61633298497866,"sku":"23d3490","price":3.99,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0771\/3685\/5370\/files\/www.aquarium-boutique.comt_19.jpg?v=1780171912"}],"url":"https:\/\/aquarium-boutique.com\/collections\/dennerle.oembed","provider":"Aquarium Boutique","version":"1.0","type":"link"}