Pethealer
Pethealer Methylene Blue Solution 250ml
Pethealer Methylene Blue Solution 250ml
A practical water-care solution for ornamental fish tanks, designed for routine aquarium care and easy dosing. Suitable for ornamental fish and available in a convenient 250ml bottle for everyday aquarium maintenance.
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Product Details
Product Details
Pethealer Methylene Blue Solution is a liquid aquarium water-care product designed for ornamental fish. It offers a practical solution for aquarium owners seeking convenient, measured application as part of their fishkeeping routine.
Product Highlights
- Designed for ornamental fish aquariums
- Liquid formula for measured application
- Clear dosage guidance based on water volume
- Convenient 250mL bottle
Why Choose Pethealer?
Pethealer is dedicated to providing practical pet and aquarium-care products. We focus on clear product information, convenient everyday solutions, and reliable customer service.
Shop directly with Pethealer in Thailand. Cash on Delivery (COD) and supported local online payment options are available, along with dedicated customer support.
Specifications
Specifications
| Product Name | Methylene Blue Solution |
| Brand | Pethealer |
| Product Type | Aquarium Water Conditioner |
| Form | Liquid Solution |
| Suitable For | Ornamental Fish |
| Net Content | 250mL per bottle |
| Pack Options | 1 / 2 / 3 Bottles |
| Country of Origin | China |
How to Use
How to Use
Recommended Dosage
Add 8–10mL per 100L of aquarium water.
Directions for Use
- Remove adsorbent filter media, such as activated carbon, before use.
- Add the recommended amount of solution according to the aquarium's water volume.
- Ensure adequate aeration during use and avoid feeding fish.
- A partial water change may be performed the following day.
Precautions
- Suitable for ornamental fish.
- Use half the recommended dosage for plecos (Loricariidae catfish).
- Use with caution for fry, breeding female fish, and marine corals.
- Keep out of reach of children.
Storage Conditions
Store in a cool, dry, and well-ventilated place.







Pethealer Methylene Blue Solution 250mL
A liquid aquarium water-care product for ornamental fish. Measure carefully according to the actual water volume being treated.
Designed for Clear, Careful Use
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250 mL Liquid
A convenient liquid format for ornamental aquarium water care.
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Measured by Actual Water Volume
Use the reference ratio and calculate from the water actually in the aquarium.
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Simple Use Instructions
Clear steps cover filter media, careful measuring, aeration, and feeding during use.
Dosage Reference
Reference ratio: 8–10 mL per 100 L of actual water. These are proportional calculations. Calculate from actual water volume, not the tank’s stated capacity.
10 L: 0.8–1 mL · 20 L: 1.6–2 mL · 30 L: 2.4–3 mL
50 L: 4–5 mL · 100 L: 8–10 mL
150 L: 12–15 mL · 200 L: 16–20 mL
Loricariidae: use half. For 100 L of actual water, use 4–5 mL.
Illustrative scene. Measuring tools not included.
How to Use
1. Prepare the filter: Remove adsorptive media such as activated carbon, but do not turn off all filtration.
2. Measure and add: Calculate from the actual water volume, measure carefully, and add.
3. Maintain aeration: Provide adequate aeration throughout use.
4. Pause feeding: Do not feed during use. A partial water change the following day is optional, not required.
Illustrative scene. Measuring tools not included.
Important Cautions
Use caution with fry, females during breeding, and marine corals. Keep out of children's reach. Store in a cool, dry, well-ventilated place.
General risk information—not verified compatibility or efficacy for this product: Methylene blue may affect biological filtration and may stain. Compatibility with aquatic plants, shrimp, and snails has not been confirmed; avoid direct addition when compatibility is unknown. Ask the manufacturer when keeping sensitive organisms. Do not mix with other treatments, increase the dose, repeat use on an assumed schedule, or add more based on water color. The active-ingredient concentration and repeat-use interval have not been confirmed; do not apply another brand's bath-treatment instructions.
Frequently Asked Questions
What is this product for?
It is an aquarium water-care product for ornamental fish. No claim is made here that it treats disease, kills bacteria or parasites, or removes ammonia or nitrite.
Can I use it with plants, shrimp, or snails?
Compatibility with aquatic plants, shrimp, and snails has not been confirmed. If compatibility is unknown, avoid adding it directly to an aquarium containing them. Ask the manufacturer if keeping it with sensitive organisms.
What general risks should I know about?
Methylene blue may affect biological filtration and may stain. These are general risk notes, not verified compatibility findings or efficacy claims for this specific product.
How much should I measure?
Use the reference ratio of 8–10 mL per 100 L, calculated from the actual water volume rather than the tank’s stated capacity. For Loricariidae, use half: 4–5 mL per 100 L of actual water.
What should I do while using it?
Remove adsorptive filter media such as activated carbon, but do not turn off all filtration. Maintain adequate aeration and pause feeding during use. A partial water change the next day is optional, not mandatory.
Which fish or animals need extra caution?
Use caution with fry, females during breeding, and marine corals. Keep out of children's reach. Store in a cool, dry, well-ventilated place.
Can I repeat or combine treatments?
The active-ingredient concentration and repeat-use interval have not been confirmed. Do not apply another brand’s bath-treatment schedule, set a repeat schedule, mix with other treatments, increase the dose, or add more based on water color. Ask the manufacturer before combining products.