Best Water Choices for Hydroponic Plants: Scientific Guide and Hot Trends
In recent years, hydroponic plants have become a popular choice for urban gardening due to their environmental protection, beauty and ease of operation. As discussions across the Internet have heated up in the past 10 days, the controversy over "what water to use for hydroponic plants" has also attracted much attention. This article combines the latest hot topics and data to analyze the scientific choice of water for hydroponics.
1. Top 5 water types for hydroponics are hotly discussed on the Internet

| water type | Discuss the popularity index | Main advantages | Applicable plants |
|---|---|---|---|
| purified water | 8.5 | No impurities, less algae | Pothos, Lucky Bamboo |
| rain | 7.2 | Naturally weakly acidic, containing trace elements | mint, rosemary |
| Cool and white | 6.8 | Remove chlorine, low cost | Chlorophytum, copper money grass |
| mineral water | 5.4 | Rich in minerals | Money tree, monstera |
| fish tank water | 4.9 | Contains natural fertilizers | Narcissus, hyacinth |
2. Key indicators of scientific water use
According to the latest experimental data from agricultural experts@PlantLab, ideal hydroponic water should meet the following parameters:
| indicator | best range | Detection tools |
|---|---|---|
| pH value | 5.5-6.5 | pH test paper/pen |
| TDS value | <100ppm | TDS detector |
| Dissolved oxygen | >6mg/L | Dissolved oxygen meter |
| Chlorine content | 0mg/L | Residual chlorine reagent |
3. Recent hot and controversial topics
1.Is "static dechlorination" effective?In the Douyin #hydroponicschallenge, 32% of users reported that residual chlorine was still detected after being left alone for 24 hours.
2.Is mineral water a waste of resources?The Weibo topic #Environmental Hydroponics has been read 12 million times, and 67% of voters are opposed to the long-term use of mineral water.
3.Fish tank water risk warning:Xiaohongshu user@hydroponicsmaster’s actual measurement shows that untreated fish tank water will increase the root rot rate by 40%.
4. Expert recommendations
The latest "Home Hydroponics Guide" released by China Agricultural University recommends:
| plant type | Preferred water source | Replacement frequency | additives |
|---|---|---|---|
| foliage plants | Purified water + nutrient solution | 7-10 days | 2 drops H2O2/liter |
| flowering plant | Rainwater + humic acid | 5-7 days | 1g/L wood vinegar liquid |
| Vanilla | Liangbaikai + earthworm tea | 3-5 days | None |
5. Popular DIY water recipes
The “golden water” formula that has become popular on TikTok recently:
1. 1L Liangbo + 2 tablets of aspirin (salicylic acid to promote root growth)
2. Add 5 drops of 3% hydrogen peroxide (antibacterial)
3. Half a spoonful of brown sugar (provides energy)
Actual measurement data shows that plants using this formula can take root 30% faster.
Conclusion:Choosing the right water source is key to successful hydroponics. It is recommended to monitor water quality parameters regularly and make flexible adjustments based on plant characteristics. Follow @hydroponics institute for daily updated data.
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