Tank upgrade fish help

Hey y'all looking to upgrade cichlid tank to maybe 100 g if not more
I have 2 jack Dempseys
1 blood parrot
1 Oscar
1 juvenile green terror
1 sail fin pleco
And 5 silver dollars
My question is are their anymore fish I can add if I get a massive tank I want some more schooling fish possibly cats
All help appreciated : )

 

If it is a 100g, this stock would make it already stocked, if not overstocked. IMO

 

You don't want schooing fish with those large cichlids. Oscars will eat any fish small enough to eat. Silver dollars are about all you can have schooling wise.

 

What tank would have enough toom

 

Upwards of 250 gallons, imo, because that many large cichlids will have territory issues in smaller tanks.

 

Which ones
Theyr not so big at moment but they haven't been aggressive at all

 

All of them. When they're older you will certainly see issues if kept in a smaller tank.

 

Alright and one more thing
Do u think a sandy substrate would be alright or does that make it to hard to clean?

 

Sand would be ideal, it's easier to clean than gravel and if you get the type from Tractor Supply it will save you tons of money.