---
product_id: 253773403
title: "NilocG Aquatics Co2 Drop Checker Solution | | 4dKH/Ph Reagent For The Most Accurate Monitoring of Your Planted Tank Co2 Levels"
brand: "nilocg aquatics"
price: "€ 27.00"
currency: EUR
in_stock: true
reviews_count: 5
category: "Niloc G Aquatics"
url: https://www.desertcart.ie/products/253773403-nilocg-aquatics-co2-drop-checker-solution-4dkh-ph-reagent-most
store_origin: IE
region: Ireland
---

# 4dKH premixed solution color-change indicator 2-hour accurate reading NilocG Aquatics Co2 Drop Checker Solution | | 4dKH/Ph Reagent For The Most Accurate Monitoring of Your Planted Tank Co2 Levels

**Brand:** nilocg aquatics
**Price:** € 27.00
**Availability:** ✅ In Stock

## Summary

> 🌿 See your CO2 levels in color — because your plants deserve precision!

## Quick Answers

- **What is this?** NilocG Aquatics Co2 Drop Checker Solution | | 4dKH/Ph Reagent For The Most Accurate Monitoring of Your Planted Tank Co2 Levels by nilocg aquatics
- **How much does it cost?** € 27.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/253773403-nilocg-aquatics-co2-drop-checker-solution-4dkh-ph-reagent-most)

## 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 Alerts:** Blue means low, green means optimal, yellow signals high CO2—protect your aquatic life instantly.
- • **Compact & Discreet Design:** Fits neatly in your aquarium corner without disrupting your tank’s aesthetic or ecosystem.
- • **User-Friendly Flip-Top Bottle:** Easy to use and refill, designed for hassle-free maintenance in any planted tank setup.
- • **Effortless Monitoring in 2 Hours:** Quickly assess your tank’s CO2 levels with a simple color change—no guesswork needed.
- • **Precision-Calibrated 4dKH Solution:** Ensures the most accurate CO2 readings by eliminating water hardness variables.

## Overview

NilocG Aquatics Co2 Drop Checker Solution is a premium, premixed 4dKH and pH reagent designed for the most accurate and reliable monitoring of CO2 levels in planted aquariums. Its easy-to-use flip-top bottle and clear color-change indicator provide a quick, visual confirmation of optimal CO2 concentration (30ppm), helping aquarists maintain a healthy balance for thriving plants and fish. Unlike generic solutions, it removes water hardness variability, delivering precision and peace of mind in every drop.

## Description

One of the common concerns among hobbyists just getting started with high tech setups is achieving adequate co2 without causing harm or stress to their fish. As a general guideline, most aquarists can agree that 30ppm of dissolved co2 is where we want to be for out plants and fish to thrive.But how do we know if we have too much or too little?A glass drop checker with a standard solution is by far the most reliable way to have a visual representation of your co2 levels without all the guesswork. It is also the most straight forward. When the solution is blue, you need more co2. If its yellow, you’ve gone too far. If its green, you’re good to go!Indicator solution kits on the market have their downfalls. Some fail to change color or can be difficult to read. This is because they recommend using water from your tank to create a reference solution, and as most of us know not every tank represents a standard value!With NilocG Aquatics all in one co2 inidicator solution, your systems water hardness is taken out of the equation. This solution is calibrated to 4dkh and will provide the most true and responsive indicator solution on the market.

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

- WHY SHOULD YOU PURCHASE THIS INDICATOR SOLUTION: The biggest reason is that it comes with 4dKH fluid and ph reagent PRE-MIXED. If you aren’t using 4dkh fluid your reading is very unlikely to be accurate. The indicator solution comes with a flip top bottle for extremely easy use.
- IMPORTANT- MUST READ- It is very important to use 4dkh fluid and ph reagent in your Co2 drop checker. If your drop checker directs you to use tank water then it will not be accurate and you will not have a good idea of what the actual co2 levels are. If your co2 drop checker doesnt list 4dkh fluid then assume you dont have it. Its a must have for optimum accuracy!!!!!!!
- Highest Quality 4dKH/PH solution. Monitoring co2 levels in your planted aquarium is very important for the health of your plants and fish.
- EXTREMELY EASY TO USE Solution- To use simply fill your drop checker half way with the Co2 Indicator Solution. Place the drop checker in your planted tank. Wait 2 hours to read Co2 levels.
- HOW TO READ CO2 DROP CHECKER- When your co2 is off the drop checker solution will be a deep blue color. After co2 has been on for around 2 hours you should notice the color change. Optimal co2 concentration will be at 30ppm which will be a green-light green color. If it remains blue your co2 is too low. If the color turns yellow then your levels are too high and may harm your fish. USE THE COLOR CHART ON THE SIDE OF THE CO2 INDICATOR SOLUTION or ON THE PRODUCT INSERT-

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07149CWLZ |
| Batteries Included | No |
| Best Sellers Rank | #45,487 in Pet Supplies ( See Top 100 in Pet Supplies ) #410 in Fish Medication & Health Supplies |
| Customer Reviews | 4.6 4.6 out of 5 stars (2,186) |
| Date First Available | 28 December 2018 |
| Item Form | Liquid |
| Item Weight | 82 g |
| Item model number | 9899836 |
| Product Dimensions | 3.56 x 3.56 x 8.13 cm; 82 g |
| Quantity | 1 |
| Size | B185 |
| batteries required | No |

## Product Details

- **Brand:** NilocG Aquatics
- **Item form:** Liquid
- **Liquid volume:** 50 Milliliters
- **Manufacturer:** NilocG Aquatics
- **UPC:** 702921923559

## Images

![NilocG Aquatics Co2 Drop Checker Solution | | 4dKH/Ph Reagent For The Most Accurate Monitoring of Your Planted Tank Co2 Levels - Image 1](https://m.media-amazon.com/images/I/51t+F87jGqL.jpg)
![NilocG Aquatics Co2 Drop Checker Solution | | 4dKH/Ph Reagent For The Most Accurate Monitoring of Your Planted Tank Co2 Levels - Image 2](https://m.media-amazon.com/images/I/71sm6VktZIL.jpg)
![NilocG Aquatics Co2 Drop Checker Solution | | 4dKH/Ph Reagent For The Most Accurate Monitoring of Your Planted Tank Co2 Levels - Image 3](https://m.media-amazon.com/images/I/61rt1lVNErL.jpg)

## Available Options

This product comes in different **Pattern** options.

## 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

## Frequently Bought Together

- NilocG Aquatics Co2 Drop Checker Solution 4dKH/Ph Reagent for The Most Accurate Monitoring of Your Planted Tank Co2 Levels
- Glass CO2 Drop Checker – CO2 Monitor Kit for Aquarium Tank – Functional and Reliable – Transparent Drop Checker, 4dkh/pH Reagent Solution and Suction Cup

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-22*