---
product_id: 253773406
title: "NilocG Aquatics Glass Co2 Drop Checker with 4dkh/PH Solution | Quickest, Most Accurate & Easiest to Use | | Glass Co2 Drop Checker with 4dKH/Ph Reagent Most Accurate Monitoring of Your Co2 Levels"
brand: "nilocg aquatics"
price: "€ 77.92"
currency: EUR
in_stock: true
reviews_count: 5
category: "Niloc G Aquatics"
url: https://www.desertcart.es/products/253773406-nilocg-aquatics-glass-co2-drop-checker-with-4dkh-ph-solution
store_origin: ES
region: Spain
---

# High-quality glass drop checker 2-hour reliable CO2 reading 60ml 4dKH/pH reagent solution NilocG Aquatics Glass Co2 Drop Checker with 4dkh/PH Solution | Quickest, Most Accurate & Easiest to Use | | Glass Co2 Drop Checker with 4dKH/Ph Reagent Most Accurate Monitoring of Your Co2 Levels

**Brand:** nilocg aquatics
**Price:** € 77.92
**Availability:** ✅ In Stock

## Summary

> 🌿 Keep your aquatic garden thriving with precision CO2 insights!

## Quick Answers

- **What is this?** NilocG Aquatics Glass Co2 Drop Checker with 4dkh/PH Solution | Quickest, Most Accurate & Easiest to Use | | Glass Co2 Drop Checker with 4dKH/Ph Reagent Most Accurate Monitoring of Your Co2 Levels by nilocg aquatics
- **How much does it cost?** € 77.92 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/253773406-nilocg-aquatics-glass-co2-drop-checker-with-4dkh-ph-solution)

## Best For

- nilocg aquatics enthusiasts

## Why This Product

- Trusted nilocg aquatics brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Clear Visual Indicator:** Color-coded solution (green = optimal, yellow = high, blue = low) for quick assessment.
- • **Compact & Discreet Design:** Sleek glass checker tucks neatly in your tank, blending seamlessly with your aquatic setup.
- • **Effortless 2-Hour Readings:** Get accurate CO2 levels without syringes or complicated tools.
- • **Trusted Accuracy & Quality:** Premium glass construction ensures durability and precise CO2 monitoring every time.
- • **Complete CO2 Monitoring Kit:** Includes glass drop checker, suction cup, and 60ml reagent for instant setup.

## Overview

The NilocG Aquatics Glass CO2 Drop Checker Kit offers a complete, easy-to-use solution for monitoring aquarium CO2 levels. Featuring a high-quality glass drop checker, a suction cup for secure placement, and a 60ml bottle of 4dKH/pH reagent, it delivers reliable color-coded readings within 2 hours. Designed for millennial aquarium enthusiasts, this compact tool ensures optimal plant health by providing clear, accurate CO2 level feedback without the hassle of complex equipment.

## Description

Worried about the health of your aquarium plants? How can you take care of them if you don't know whether or not they are getting a sufficient amount of CO2? Our CO2 Monitor Kit For Aquarium Tank helps you to keep a constant check on CO2 levels in your fish tank. Fish Tank Essential: To take better care of your aquarium plants, you need to have a proper check on their CO2 levels to ensure their proper health and functioning. This CO2 detector hence makes one of the most important items in your aquarium kit. Reliable Choice: Compared to other CO2 level monitors in the market, our water tester kit gives a more accurate measurement as it doesn't take water from the tank. You have to insert the glass drop checker inside the tank with the pH solution and wait for the readings. Easy Readings: Use the color chart to compare the CO2 level reading. Green color means the optimal CO2 level while other colors mean some deficiency or excessiveness of CO2.

Review: I’ve been using this drop checker in my planted tank for about two weeks now, and I don’t really have any complaints. It’s a small thing, but it does what it’s supposed to without getting in the way — which is more than I can say for a few other ones I’ve tried. First off, the design is clean and compact. It tucks neatly into the corner of the tank and doesn’t draw much attention, which I like. It comes with everything you need to get started, including the indicator solution and a pipette. The instructions were actually super clear — one of the few times I haven’t had to google a setup video just to make sure I was doing it right. I noticed the color change after a couple hours and it’s been easy to read since. The green shows up clearly through the glass and gives me a good sense of where my CO₂ is sitting throughout the day. So far, so good. That said, one thing to note — if you’re using a CO₂ system without a built-in drop counter, this won’t replace that. You’ll still need a separate bubble counter to dial in your injection rate. The drop checker tells you what’s going on in the tank, not what you’re actually dosing, so it’s more of a confirmation tool than a control one. What I Like: • Small and low-profile • Clear and simple setup • Comes with everything needed to start • Easy to read color change Heads Up: • Doesn’t function as a drop counter — you’ll still need one if you don’t already have it Overall, it’s a solid little tool for keeping an eye on CO₂ levels. It does the job without being bulky or confusing, and at this price point, I think it’s worth it. Would recommend if you want a reliable visual check without spending a ton..
Review: .

## Features

- Complete Kit: Our aquarium water C02 drop checker/monitor contains everything you need for efficient monitoring of CO2 levels in your tank. The fish tank C02 drop checker/monitor includes the highest quality glass drop checker, suction cup, and a 60ml bottle of 4dkh/pH reagent solution.
- Easy To Use: The user-friendly CO2 detector is very convenient and gives you reliable reading in about 2 hours without syringes or other such items. Just fill the carbon dioxide monitor drop checker with the indicator solution and place it in the planted tank with the help of the suction cup.
- Clear Readings: If the pH solution turns green/light green that means your aquarium tank has the optimal level of carbon dioxide. The yellow color of the aquarium kit liquid means the CO2 level in the water is very high while the blue color means there is insufficient level of CO2.
- Essential Item: You need to be very careful about the health of your plants and carbon dioxide is one of their major requirements. This CO2 monitor kit is one of the most vital items of your aquarium kit that helps you to keep a constant check on CO2 levels in the water.
- Quality Guaranteed: The high-quality glass CO2 checker. If you are not satisfied with the quality of the product or have some other issue, just let us know.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01MY87WVP |
| Batteries Included | No |
| Best Sellers Rank | #44,997 in Pet Supplies ( See Top 100 in Pet Supplies ) #5,286 in Aquarium Accessories |
| Color | Transparent |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,186) |
| Date First Available | 9 May 2017 |
| Item Form | Liquid |
| Item Weight | 113 g |
| Item model number | 9902018 |
| Pet Type | Aquariums |
| Product Dimensions | 12.19 x 8.64 x 8.38 cm; 112.83 g |
| Quantity | 1 |
| Size | 3 Piece Set |
| batteries required | No |

## Product Details

- **Brand:** NilocG Aquatics
- **Item form:** Liquid
- **Item weight:** 3.98 Ounces
- **Liquid volume:** 60 Milliliters
- **Manufacturer:** NilocG Aquatics

## Images

![NilocG Aquatics Glass Co2 Drop Checker with 4dkh/PH Solution | Quickest, Most Accurate & Easiest to Use | | Glass Co2 Drop Checker with 4dKH/Ph Reagent Most Accurate Monitoring of Your Co2 Levels - Image 1](https://m.media-amazon.com/images/I/61HTQ-zo2dL.jpg)
![NilocG Aquatics Glass Co2 Drop Checker with 4dkh/PH Solution | Quickest, Most Accurate & Easiest to Use | | Glass Co2 Drop Checker with 4dKH/Ph Reagent Most Accurate Monitoring of Your Co2 Levels - Image 2](https://m.media-amazon.com/images/I/51t+F87jGqL.jpg)
![NilocG Aquatics Glass Co2 Drop Checker with 4dkh/PH Solution | Quickest, Most Accurate & Easiest to Use | | Glass Co2 Drop Checker with 4dKH/Ph Reagent Most Accurate Monitoring of Your Co2 Levels - Image 3](https://m.media-amazon.com/images/I/71sm6VktZIL.jpg)
![NilocG Aquatics Glass Co2 Drop Checker with 4dkh/PH Solution | Quickest, Most Accurate & Easiest to Use | | Glass Co2 Drop Checker with 4dKH/Ph Reagent Most Accurate Monitoring of Your Co2 Levels - Image 4](https://m.media-amazon.com/images/I/717-j-aJPNL.jpg)
![NilocG Aquatics Glass Co2 Drop Checker with 4dkh/PH Solution | Quickest, Most Accurate & Easiest to Use | | Glass Co2 Drop Checker with 4dKH/Ph Reagent Most Accurate Monitoring of Your Co2 Levels - Image 5](https://m.media-amazon.com/images/I/61rt1lVNErL.jpg)

## Questions & Answers

**Q: i have a 10g tank and the api co2 booster liquid booster that i add in manually everyday. will this be good for monitoring the co2 lvls in my tank?**
A: No.  This is for measuring dissolved CO2 gas in the water.  Products like API's CO2 Booster and Seachem's Flourish Excel contain a carbon source for plants, but they do not provide CO2 gas, so this drop checker will not be useful unless you run a CO2 system.

**Q: Where in the tank should it be placed? Opposite where the diffuser is?**
A: Yes. Opposite to the diffuser. I have mine still attached to de glass from day one. Good suction cup provided.

**Q: No color change after 2 days of co2 injection.  i've even bubbled my exhalation into the drop checker.  stayed blue. any ideas?**
A: I had an issue with one of these from another company.  It ended up being the checker had a crack in it and was leaking tank water into in.  But is doesn’t apply to you, maybe you can considered these questions...are you injecting enough Co2?  Are you degassing to much Co2 during the photo period with too much surface agitation. When you insert the fluid in the checker make sure it doesn’t get diluted with water. Check your Ph....compare the degassed Ph to the Ph an hour or so after you start injecting.  There should be a difference. Depending on your setup and goals, your Ph drop should be .8-1.3

**Q: Can i use the fluval indicator liquid for this? i saw a video of someone on youtube doing so.**
A: I really don't know for sure, but my guess would be yes. This glass indicator is just a device to hold the fluid. If I had other fluid I would try it

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***. on 8 June 2025*

I’ve been using this drop checker in my planted tank for about two weeks now, and I don’t really have any complaints. It’s a small thing, but it does what it’s supposed to without getting in the way — which is more than I can say for a few other ones I’ve tried. First off, the design is clean and compact. It tucks neatly into the corner of the tank and doesn’t draw much attention, which I like. It comes with everything you need to get started, including the indicator solution and a pipette. The instructions were actually super clear — one of the few times I haven’t had to google a setup video just to make sure I was doing it right. I noticed the color change after a couple hours and it’s been easy to read since. The green shows up clearly through the glass and gives me a good sense of where my CO₂ is sitting throughout the day. So far, so good. That said, one thing to note — if you’re using a CO₂ system without a built-in drop counter, this won’t replace that. You’ll still need a separate bubble counter to dial in your injection rate. The drop checker tells you what’s going on in the tank, not what you’re actually dosing, so it’s more of a confirmation tool than a control one. What I Like: • Small and low-profile • Clear and simple setup • Comes with everything needed to start • Easy to read color change Heads Up: • Doesn’t function as a drop counter — you’ll still need one if you don’t already have it Overall, it’s a solid little tool for keeping an eye on CO₂ levels. It does the job without being bulky or confusing, and at this price point, I think it’s worth it. Would recommend if you want a reliable visual check without spending a ton..

### ⭐⭐⭐⭐ Review
*by F***S on 3 September 2024*

.

### ⭐⭐⭐⭐⭐ Review
*by C***N on 23 April 2020*

Does what its ment to do

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-03-11*