Lightly Medicated | Red Tiger Oscar

What “Lightly Medicated” means

This is the same animal as our non-quarantined listing, held briefly in our systems and given one short prophylactic course — a light treatment for ich and for internal and external worms — then observed eating in front of us before it goes home.

A light course knocks the parasite load down. It does not guarantee full removal, and we will not pretend otherwise. Ich is only killed in its free-swimming stage, and a short treatment window can miss cysts entirely; worm burdens can survive a single dose. Clearing an animal takes the full quarantine window — 40 to 90 days depending on the species — which is exactly what the Quarantined listing is for. This tier buys you a lower parasite load and a fish we have watched eat, not a cleared animal.

We condition the fish on our end. Every animal we medicate is brought back onto prepared food on our own systems and is eating before it leaves — in practice it is rare for a lightly medicated fish to ship out and arrive sick. Do the same at your end: get it eating in your aquarium before you count it settled.

When it ships

Plan on 3–5 days on our systems for the treatment course, and it does not leave until it is eating. If the animal is not already in our systems we source it first — allow up to two weeks for it to reach us before that clock starts. From the day you order, plan on roughly two and a half weeks in total.

The guarantees

• Shipped orders: 24-hour live guarantee from confirmed delivery.
• In-store pickup: 7-day live guarantee — bring a water sample from your aquarium so we can test it before your livestock goes home with you.

Want the full program — treated, observed, confirmed eating, and covered for 28 days on pickup? That is the Quarantined listing. Run your own quarantine and just want the fish this week? The non-quarantined listing is cheaper still. The whole ladder is explained in Quarantined vs Non-Quarantined.

Red Tiger Oscars are a selectively bred color form of Astronotus ocellatus — a cichlid native to the Amazon River basin and one of the most intelligent fish most hobbyists will ever keep. In the wild, these fish cruise slow, turbid backwaters and floodplain lakes, hunting by sight and ambushing smaller fish and invertebrates with a speed that contradicts their laid-back cruising pace. In a tank, they bring that same predatory intelligence to the glass and direct it at you — Oscars learn to recognize individual people, associate them with food, and will come up for hand-feeding within weeks of settling in. That’s not anthropomorphizing, that’s just how their brain works.

They grow fast and they grow large. A healthy Oscar can hit 10–12" in its first two years, which means the 75-gallon minimum is a starting point, not a long-term plan. A 125+ gallon single-specimen or species-compatible setup is where they truly thrive. They’re messy eaters and heavy waste producers — biological filtration needs to be seriously oversized and water changes consistent, because ammonia spikes will shut down their immune system fast.

Stock with fish large enough not to be a meal: other large cichlids, armored catfish like Synodontis or large plecos, or similar-sized species with the reflexes to avoid getting cornered. Avoid feeder goldfish — nutritionally poor and a reliable vector for disease.

Scientific name: Astronotus ocellatus
Origin: Amazon River basin, South America — slow-moving backwaters, oxbow lakes, and floodplains
Water parameters: Temp 75–80°F · pH 6.0–7.5 · Hardness 5–20 dGH
Tank requirements: 75 gal minimum; 125+ gal preferred for a single adult
Diet: Carnivore — large cichlid pellets as a staple; supplement with earthworms, frozen meaty foods
Compatibility: Predatory; stock with similarly-sized species only
Husbandry note: Oscars stress easily and show it through ich. Stable temperatures, pristine water quality, and a varied diet are the best prevention — an oversized filter and a reliable heater are non-negotiable with this species.