Water Electrolyzer Test Kit, Home Water Quality Tester with Electrodes, Water Purity Measuring Tool for Household or Educational Science Use

I was happy to finally test our water. I’ll never use hot water from the tap for cooking again. Thankfully, our cold tap was fine. I finally learned why they say to replace the refrigerator filter every 6 months. We were 2 years overdue and the water was terrifying. We now drink distilled water and add our own minerals.

After googling this product it doesn't work it wrote maybe for a "theatrical trick than a scientific test". " While the chemical process (electrolysis) is real, the interpretation given by the people selling these devices is a scam" . Something about the iron rods and aluminum. So no I would not purchase. The heavy one is your Iron one on each side, then one Aluminum on each side

Great item. Changed our preception of clean tap water.

I should have done more research on this tester. Based on what I found, people may misinterpret the presence of visible particles as a sign of poor water quality, which is not necessarily the case. Some dissolved solids, such as minerals, can be entirely natural and harmless. While electrolysis devices may offer a visually striking way to demonstrate the presence of dissolved solids in water, they should be used with caution and a full understanding of their limitations. This method provides only a partial and qualitative view of water quality, making it highly misleading for assessing water safety or making informed decisions about water treatment

This test was great. Really fun to do with the kids especially when my city of Corpus Christi is running out of water and it’s too far gone to even do a water boil!

We used this electrolyzer to “test” different types of water in our home. For our first test, we had public tap water from the kitchen sink, unfiltered, in one glass and shower water from our 20-stage filtered showerhead, new filter installed yesterday, in another. The kitchen water turned brownish yellow with a little green, while the filtered shower water appeared more greenish blue. Next, we tested our reverse osmosis kitchen water along with bottled Saratoga still water. The reverse osmosis water had a slight yellow tinge, while the Saratoga stayed completely clear. Most public water has issues, which is why we use reverse osmosis at the kitchen sink and bottled water in glass. This test shows differences visually and suggests it is a good idea to get professional water testing done for peace of mind. Here is a simple explanation for the colors we saw: Brownish yellow with a little green for public tap water: lots of minerals like calcium and magnesium react with electricity and the electrodes. Not dangerous, just shows minerals are present. Greenish blue for filtered shower water: the shower filter removes some minerals, so the colors are lighter. Shows the filter changes the water, not that it is toxic. Slight yellow for reverse osmosis water: very few minerals left, only a tiny reaction occurs, giving a faint yellow color. Clear for bottled Saratoga water: almost no minerals or ions, so electricity does not cause any color change. Shows the water is very pure. The test kit itself is very simple to use. Instructions are limited, only a small guide printed on the machine, but it is basically plug in, insert electrodes into water, and watch the color change in 30 to 60 seconds. Important note, the color changes do not automatically mean your water is toxic or contains heavy metals. Most of the color comes from the electrodes reacting with minerals and ions in the water. Tap water often shows more color because it has more dissolved minerals, while bottled water may stay clear simply because it has fewer minerals. This makes the kit great for visually comparing tap, filtered, and purified water and for educational purposes, not for identifying dangerous contamination. Overall, it is a fun and educational tool for seeing electrolysis in action and understanding how water composition varies. It works well for classroom demonstrations or at-home science experiments.

There were some safety concerns.

Very simple but interesting water quality tester. I compared store bought Purified Water that we drink all the time, Brita filtered water and tap water. The Brita filtered water and tap water were almost the same, with a green water result. SCARY! Although the taste of the water between Brita and tap is different, Brita being almost tasteless, it seems that the Brita filter only removes the taste. (Before the electrolysis obviously). The store bought purified water had only a slight yellow tinge toward the surface, the rest was clear. I was totally amazed at how the electrolysis of the tap water converted it from clear to swamp green with stuff in it. This is NOT from the water. First picture: left - Yellow (Purified water), right - Green (Brita filtered water) Second picture: left - Green (Brita filtered water), right - Green (tap water). Almost no difference. During the beginning stages the Brita filtered is very slightly slower to change than the tap water, but in the end they are the same color. Excerpt "The Formation of "Dirty Green" Sludge Ion Production: The iron electrode releases \(Fe^{2+}\) ions into the water. Hydroxide Reaction: Simultaneously, the electrolysis of water at the cathode produces hydroxide ions (\(OH^{-}\)). Chemical Combination: These iron and hydroxide ions meet to form iron(II) hydroxide (\(Fe(OH)_{2}\)), which is a thick, gelatinous green sludge. Color Shift: Over time, this green sludge may oxidize into iron(III) oxide-hydroxide, causing the water to turn brown or orange (rust-colored). Why Tap Water Turns Green (and Pure Water Doesn't) Tap Water: Contains dissolved minerals and salts (TDS) that make it conductive. This allows the current to flow, triggering the corrosion of the iron electrode. Purified Water: Distilled or reverse osmosis (RO) water lacks these minerals and does not conduct electricity well. Because no current flows, the iron electrode remains intact and the water stays clear. Warning: This process is often used in misleading demonstrations to falsely suggest that tap water is "filled with toxins." In reality, the "dirty" material is simply the electrode itself dissolving into the water.