I really never had any problem wasting any food i feed to my O and Jack but just making sure if this is the correct way to feeding them. First of all, I feed them Hikari Bio Gold medium sized pellets. I feed them 3 times a day considering my O is 4-5 inches and the Jack is 3 inches. Just got them a 2-3 weeks ago. I know when my fish is hungry cuz they would always go to the top when i turn on the light and get near the tank. I put in like 2 pellets in and the oscar would eat it right away. You could always hear him crunching on it. And the Jack would eat the other one. but takes like 1 min to fully consume the pellet since the pellet is pretty big for him. I can't afford to buy mini pellets . After the oscar is finish eating that pellet, which is like 10 seconds or so, it would come up to the tank again. Then, I would put one pellet in for him or her to eat. The oscar would immediately grab and eat it. Then, I would keep continuing this process until the oscar starts spitting out little bits of the pellet out of his or her gills. Which is about 5-10 pellets (mostly around 7-8 pellets). Meanwhile when the Jack is finish eating his or her pellet, I would put 2 pellets in for the oscar and Jack. The Jack would also grab the pellet and eat it right away. Then little bits of the pellet would come out of his or her gills, so I stop feeding the Jack. After all that, they would still come to the top of the tank for more food. Should I still feed them or not? I heard from reading one of the articles in this site that I should stop feeding right away when they start having food coming out of their gills. I do feed them a cube of blood worms once every week on Sunday or Saturday in the morning. And 3-4 crickets once a week also. Crickets are really messy food when you see very little bits of them on top of the tank. I never feed them feeder fish or any sort cuz I'm afraid of shortening their lifespan by doing this. Sorry for the long message, just making sure I'm feeding them the right way .
Note: Sorry, I still don't know the sex of my fishes .

Ok, I will suggest you continue the same process, but only feed twice a day...

The food coming out of the gills is NORMAL, and does not mean your Jack is full. Feed what the can consume in 2 or 3 minutes and then stop feeding and remove any uneaten food.

The medium pellets as long as they are being eaten are fine. Crickets are great for them, and so are bloodworm.

You are doing great! Keep it up!

Just watch to see if they hold food in there mouth, because they will eat more then there stomach will hold

Thanks for the advice. I'm going to feed them twice a day now. At what times should I feed them though? In the morning, afternoon, or night? And I do stop feeding them after 2-3 minutes cuz that's when the Jack is done eating his 2nd pellet and the oscar is already spitting out little bits of food from his or her gills. I just realized it said #1 bitch under your name . What else do you think I should feed them for a varied diet?

I would feed in the morning, and at night. They will eat all kinds of things. Nuts, fruit, veggies, worms, crickets, mealworms, bloodworms, pellets, just avoid anything with fat... No meat, no golfish... Oscars can't process fat.

LOL... And Trust me, I am the #1 Bitch! LOL

You might be . But why 2 times a day? It seems like they're hungry all the time.

Oscars are MASTER beggars.... They are hungry even when they aren't hungry.

You should learn quickly to say no.

Twice a day is plenty to keep them fat and happy.

After he hits 6 inches or so, cut back to once a day...

As adults I only feed mine every other day!

Ha "just learn to say no". I will try to do that when I'm finish feeding them. I'm going to say no more you fat ass and leave the next time I finish feeding them.

EXACTLY... LOL... They will beg, but excess food equals bad water quality! So if you can't say no... They you will be in the tank cleaning 3 times a wee. LOL