125 Gallon tank, only 1 Oscar plus how many SD (red hook or spotted)

[Hmontoya93]

Hello I have an Oscar in my 125 gallon only 3 inches atm. (6 ft)

I am going to add only silver dollars as tank mates, I can realistically do one 40-50 percent water change a week, fluvial fx4 and ac 110 as filtration


I was thinking 7-10 spotted or like 4-5 red hook would that work??

. basically I want the biggest school possible of either or and I really want to max their growth so I am trying to find a good balance

thank you to the forum for always helping

 

[A201]

Spotted SD's don't grow nearly as large as Red Hooks but top out big enough not to be easily eaten by most adult Oscar's.
IMO, a 125 isn't roomy enough to house a full grown Oscar and a group of adult Red Hooks.
Spotted SD's get my vote.

 

[Hmontoya93]

Spotted SD's don't grow nearly as large as Red Hooks but top out big enough not to be easily eaten by most adult Oscar's.
IMO, a 125 isn't roomy enough to house a full grown Oscar and a group of adult Red Hooks.
Spotted SD's get my vote.

how many would you recommend

 

[A201]

I kept a group of five Spotted SD's & five Striped SD's together in a 120 long with no problems.

 

[FJB]

My opinion - either one will be fine.
As they grow, you may find the need for higher water changes (amount or frequency). Large oscars are very messy. Large silver dollars produce relatively invisible but abundant waste.
I have a 125gal with what may be comparable biomass, and filtration is an FX6 + AC110 + Penguin 350 and do 50-60% water changes weekly. I can't imagine doing less than that, and wish I could do more (WC's).

 

[tlindsey]

I agree with A201 the smaller Spotted Silver Dollar would be my choice because of size.

 

[Gourami Swami]

I think you would be OK with either, but the spotteds will be a bit smaller in the end, and are usually cheaper and more readily available. So they get my vote as well.