There are three main types of food I’ve tried feeding my Oscars with varying degrees of success.  Let’s start with the most basic:

Flakes

The first type of food you’ll find readily available on the market are Flake type foods.  One flake type food suitable for Cichlids is called Tetra Cichlid Large Flakes.  These types of foods last a long time, they are easily digested by fish and they promote naturally vibrant color and strong immunity.

I wasn’t sure if my Oscars would like this type of food, but they seemed fairly satisfied with it.  This type of food usually floats on top of the water for a few minutes and then starts to sink down to the bottom so if your Oscars don’t eat it before it drops, they might have a hard time finding it in the gravel or sand below.

If the Oscars don’t finish eating what’s floating on the surface, it’s recommended that you use an aquarium net to remove the excess food before it sinks to the bottom.

Floating Pellets

The second type of food you’ll find out there are floating pellets.  Hikari Cichlid has one that comes in four sizes – baby pellet, mini pellet, medium pellet and large pellet.  Depending on the size of your Oscar you would purchase the pellet size that fits in their mouth.

My Oscars are about 1.5″ right now so they are still pretty small.  I wasn’t sure whether to go with baby pellet or mini pellet so I bought both and tried them both.  It turns out that the mini pellets are still a bit to big for them right now especially since they do get a bit bigger once they absorb some water from the aquarium.  So if you just bought your Oscar and it’s still a small baby around 1-2″ in length you’ll be better off with the baby pellets to start.

There are two different types of floating pellets I have found out there and tried with my Oscars.  One is green and it’s called Cichlid Staple Pellets and the other one is red and it’s called Cichlid Gold Pellets.  Cichlid Staple Pellets are the economical food that has the nutrients that the fish will need at an economical price.  The Cichlid Gold Pellets are usually a little bit more expensive but they have something called Astaxanthin (a natural nutrient) in it which helps to promote rich coloration in Oscars and Cichlids.  My Oscars are dark grey and black with bright red markings and I do want the coloration to stay bright and pronounced so I bought a package of these pellets for my Oscars as well.

So far, the Oscars haven’t really liked this type of food though.  They like playing with it since it floats on top of the water, but they just eat it and spit it back out.  I left a few pellets floating to see what will happen and when I came back a few hours later they were still there uneaten.  I’ll try feeding them these pellets again over the next few weeks, but there is one other type of food that they absolutely love…

Frozen Blood Worms

Frozen Bloodworms (red mosquito larvae) sound really disgusting but the Oscars love them.  This type of food typically comes in small frozen individual cubes.  You keep it in the freezer and when you’re ready to feed your Oscars, you simply pop out one of the frozen cubes and feed it to them.

One thing to keep in mind though is that you don’t want to just dump the frozen cube into the aquarium water.  What I do first is I use a small shot glass which I’ve dedicated to this purpose and I put a frozen cube into the shot glass and fill it half way with hot water swirling it around thawing the cube.  It only takes a few seconds to thaw out the worms and then I pour the water with the worms into the aquarium.

The Oscars I have absolutely love this type of food.  At first I was a bit worried because the worms floated down and settled in the gravel below and I thought I would have a mess on my hands, but the Oscars are very thorough when eating this type of food.  They’ll move gravel around to get at the worms below.

Other Types of Food

From the research I’ve done, I’ve hard of people feeding their Oscars everything from feeder fish to small lizards.  Personally I am going to completely stay away from this type of food.  You never know what kind of diseases feeder fish carry when you bring them from the pet store, and you’re going to be really sad when your Oscar dies because he ate a sick fish.

I’m not even going to touch the topic of feeding lizards to your Oscar as I think that’s just cruel and disgusting, but that’s just my personal opinion.  I read an article about someone who tried to feed their fully grown Oscar a puffer fish to see what happens and they were really surprised when the Oscar spat out the puffer after a few seconds and then croaked.

You can spend hundreds if not thousands of dollars and countless hours taking care of your Oscar, so why chance killing it in a few seconds by trying to feed it something you shouldn’t just to see what happens.

Summary

I’m always on the hunt for new information about Oscars, but from my research and testing I believe the best bet for feeding an Oscar fish is to feed it a variety of foods of different types such as Flake Foods, Floating Pellet Foods and Frozen Bloodworms.