Wild Fish Quarantine Protocol Singapore Guide: 30 Day Praziquantel
The single decision that separates serious wild-fish keepers from beginners who lose entire stockings is whether to quarantine. Wild fish quarantine Singapore protocol takes 30 days minimum, requires a dedicated tank, and prevents the latent parasite loads almost every wild import carries from wiping out an established display. This guide from Gensou Aquascaping at 5 Everton Park covers the tank setup, the medication schedule, the observation routine and the local sourcing for treatments that make this protocol practical.
Why 30 Days Is the Minimum
Most freshwater parasites have life cycles that incubate for one to three weeks before clinical symptoms appear. Gill flukes (Dactylogyrus, Gyrodactylus) often go unseen for ten to fourteen days post-import. Internal nematodes (Camallanus, Capillaria) can incubate for two to four weeks before red worms protrude from the vent. Ich tomonts on the substrate hatch in three to seven days but a single missed cycle can re-infest. Thirty days covers the highest-risk windows for most parasites.
Quarantine Tank Setup
A dedicated 60-litre bare-bottom tank with a sponge filter, a heater, dim lighting and a tight lid. No substrate (medications absorb into gravel and disrupt dosing). No live plants (most react badly to medication). Use the aquarium tank range for quarantine-suitable shapes. The filter must be cycled — run the sponge in your display sump for two weeks before the import lands so it carries mature biological media.
Water Parameters
Match quarantine water to the fish’s origin chemistry — soft acidic for blackwater species, harder for African cichlids, brackish for mangrove fauna. Wild fish stressed by transit cannot also process a parameter shift on top of medication exposure. Use the aquarium pump range for filter and heater sizing.
The Medication Schedule
Days 1-7: observation only, no medication. The fish needs to recover from transit shock before adding chemical stressors. Drip acclimate, dim lighting, no feeding day one, light feeding from day two onward.
Days 7-14: Praziquantel for Flukes
Dose Praziquantel at 5mg per litre of tank water. Hold for seven days, then perform a 50 per cent water change. Praziquantel treats both gill flukes and tapeworms — almost universal in wild imports. Available as Sera Tremazol or generic Praziquantel powder from Lazada and aquarium suppliers at SGD 20-40 per pack.
Days 14-21: Levamisole for Internal Nematodes
Levamisole HCl at 2mg per litre, dosed at lights-out, with the tank covered to keep the room dim. Repeat after seven days to catch the second life-cycle wave. Available from local veterinary suppliers and online at SGD 25-45. Fast the fish for 24 hours before dosing — stomach contents reduce absorption.
Days 21-30: Salt for Ich Prevention
Add aquarium salt at 1g per litre as a low-grade prophylactic against ich and external bacteria. Most SE Asian and Amazon wild fish tolerate this brief mild salinity without issue, though scaleless species like loaches and stingrays need a half-dose at 0.5g per litre.
Observation Routine
Twice daily — morning and evening — check for clamped fins, unusual hiding, refused food, white spots, red gill flushing, scratching against decor, stringy white faeces, or any visible worms. Log every observation in a dedicated notebook. Photograph daily so you can compare condition over time.
Feeding During Quarantine
Restrained but consistent. Live blackworm, baby brine shrimp, frozen bloodworm work for most wild fish. Browse the fish food range for high-quality options. Stop feeding the day before any major water change or medication dose. Light feeding reduces nitrate buildup in the unplanted quarantine tank.
The Day-30 Decision
If the fish have eaten consistently for 14+ days, show no clinical symptoms, hold steady weight and behaviour, they are ready for transfer to the display. Drip acclimate from quarantine to display assuming parameters are matched. If anything looks off, extend quarantine for another 14 days. Better to delay than to introduce a sub-clinical infection to your community.
Singapore Sourcing
Praziquantel powder and Levamisole are stocked by Iwarna’s wholesale arm and a few specialist Carousell sellers under “wild fish meds” listings. Aquarium salt is universally available. Check the decoration and substrate range for additional water-care products.
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Still Have Questions About Your Tank?
Drop by Gensou Aquascaping — most walk-in questions get answered in under 10 minutes by someone who has set up hundreds of tanks.
5 Everton Park #01-34B, Singapore 080005 · Open daily 11am – 8pm
