i saw this id shark and could not resist:blush:

You have lots of beautiful fish and an impressive tank! I’m new to Oscars (I am still doing research and have not purchased one yet) and have noticed you do not have gravel in that aquarium. Is there a reason why?

nice set up. substrate is a preference of hobbyist,
one can have it or not. is that id shark a pangasius
specie in south east asia?

Thanks. I bet not having substrate will keep the tank cleaner!

Are you planning on keeping all of those fish? At the moment, the Oscars are quite small, once they get bigger, I think you're going to run into problems with water quality.

i agree with ofl. you solved your tank problem with your oscars but will run into the same problem again with the id shark in time. it is an impressive specimen however. as long as you stay on top of your maintenance you should be fine until the oscars get bigger.

i have no substrate 2 reasons one the tank stays cleaner longer and two i have no idea ow i am going to decorate the tank im not sure exactly what type of ID shark it is one of the smaller oscars im holding for a friend and now im saving up for a fx5 filter maybe santa will bring me one