I have 1 gallon fish tank, how do i use this product? do I need to do a water change after first dips?

Seachem states: For 1 hour dips, use 3 mL per 4 L (1 gallon*). Dips may be extended if fish show no evidence of stress. It says nothing about a water change.

Does this kill leeches and leech eggs? Will be used in quarantine buckets for plants and decorations, not the tank.

Malachite green whish is active ingredient kills them so in theory yes it should work. I've used it for hdras and flukes which both tend to be more hardy than leaches.

Will this cause ammonia spike? Or, kill any beneficial bacteria?

I personally didn't have any problems. I used a half dosage twice a day and it worked well. I would use caution though with sensitive fish.

I have 37 gallon tank and how many times do i use to cure the ich?

I used a capful for my 37 gallon tank and followed the instructions on the bottle for the amount of daily treatments. Hope this helps. It cleared my tank of ich and will take care of any parasites. If you have shrimp. etc it might be too strong for them...I only had fish.

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Seachem ParaGuard 100 mL / 3.4 fl. oz.

Product ID: 12204032

Details

Brand
Seachem
Item Form
Liquid
Item Weight
4.2 ounces
Liquid Volume
100 ml
Number of Packs
1

🌊Safe for fresh & saltwater

💧10% aldehyde-based formula

🛡️Fish & filter safe, no pH change

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Description

🛡️ Protect your aquatic ecosystem like a pro—because your fish deserve the best!

TRUSTED PROVEN - Highly rated with 4.6 stars and a staple since 2004 for professional-grade parasite control.
FISH FILTER FRIENDLY - No formaldehyde or methanol, ensuring safe treatment without harming beneficial bacteria or altering pH.
STRESS FREE INTRODUCTION - Ideal for new fish arrivals, preventing outbreaks and protecting your aquatic community.
POWERFUL PARASITE DEFENSE - Eradicates ich, fungal, bacterial & viral lesions with a unique aldehyde blend.
UNIVERSAL AQUARIUM COMPATIBILITY - Perfect for both freshwater and marine tanks—hospital and quarantine ready.

Seachem ParaGuard is a 100 mL liquid medication featuring a 10% aldehyde-based formula that safely and effectively controls parasites and external infections in both freshwater and marine fish. It is uniquely fish and filter safe, does not alter pH, and is ideal for hospital and quarantine tanks. ParaGuard excludes harmful formaldehyde and methanol, making it a trusted choice for professional and hobbyist aquarists since 2004.

Specifications

ASIN	B000255R3I
ASIN	B000255R3I
Allergen Information	Yam Free
Best Sellers Rank	#26,127 in Pet Supplies ( See Top 100 in Pet Supplies ) #213 in Aquarium Water Treatments
Brand Name	Seachem
Customer Reviews	4.6 4.6 out of 5 stars (1,702)
Date First Available	June 20, 2004
Global Trade Identification Number	00000116060509
Included Components	Seachem ParaGuard 100ml
Item Form	Liquid
Item Type Name	Medication
Item Weight	4.2 ounces
Item model number	001273
Liquid Volume	100 ml
Manufacturer	Seachem Laboratories, Inc.
Manufacturer	Seachem Laboratories, Inc.
Manufacturer Part Number	605
Model Number	001273
Number of Items	1
Number of Packs	1
Pet Type	Fish
Product Dimensions	0.16 x 1.61 x 0.16 inches; 4.2 ounces
Target Species	Fish
UPC	015568977237 000116060509
Unit Count	3.4 Fluid Ounces

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40.11 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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