Help me stock a 700L Oscar tank!

  • We are currently upgrading MFK. thanks! -neo
I would just stick with a pair of oscars in the long run, nothing else. Silver dollars should be in a group of 8+, anything less and they start to act differently. I've tried them, but they made my oscar too skittish, always bolting when someone walked by the tank or a water change was done.


Silver Dollars are weird. My three Tiger SD/s are jumpy in a 125 with my Geos, but the three Thin Bars in a different 125 in the same room, are super chill and never freak out.
 
Maybe just make it a oscar only tank? 4-6 would be perfect in my opinion
 
Silver Dollars are weird. My three Tiger SD/s are jumpy in a 125 with my Geos, but the three Thin Bars in a different 125 in the same room, are super chill and never freak out.

Never had the thin bars, just the regular silver D's commonly available.
 
I've had it running for around a week, after getting it home and seeding it from my current Malawi tank, (it had been running anyway, and I kept the filter media wet on the journey home), so it should be about ready for fish.

Maybe i'm interpreting this wrong but it reads to me like you've set up your new 5x2x2 and seeded it with media and had it running for a week.....with no fish in it???? And then you state that your large clowns and pictus are going in tomorrow!!!!! IS THIS CORRECT?

If that tank has been running for a week without fish, or any other ammonia source, your seeded media you put in the tank won't be seeded any more, they may have died off because there hasn't been a food source for the past week. Put your large clowns and pictus in there tomorrow and I guarantee you will, within 48 hrs, have a potential tank wipe out on your hands. The ammonia will sky rocket without sufficient BB numbers.

If i've just read your post wrong forgive me, and ignore my advice, but if i'm right then you need to be extremely careful when adding those fish. And when you say "a few places that came with the tank", do you mean plecos? If so that's a whole lot worse.
 
I agree with esoxlucius esoxlucius on this; I don't think you have lost all your beneficial bacteria, but I'd bet their population has dropped far enough during a week without food that adding a bunch of big fish simultaneously is asking for trouble.

And I know I tend to favour lower stocking densities than a lot of folks, but to my thinking putting 10 "large" Clown Loaches into a 5 foot tank is already fully- or even over-stocked. Clown Loaches get well over a foot long, albeit slowly; how big are yours now? Same with Oscars; four adult Oscars jammed into a 5-foot tank is crowded, without even considering the aggression which will likely develop in time. Whittling that down to two if they pair off would be good, but then any other fish you try will suffer attack.

I would suggest cutting way back on your stocking expectations with this tank.
 
I agree with esoxlucius esoxlucius on this; I don't think you have lost all your beneficial bacteria, but I'd bet their population has dropped far enough during a week without food that adding a bunch of big fish simultaneously is asking for trouble.

And I know I tend to favour lower stocking densities than a lot of folks, but to my thinking putting 10 "large" Clown Loaches into a 5 foot tank is already fully- or even over-stocked. Clown Loaches get well over a foot long, albeit slowly; how big are yours now? Same with Oscars; four adult Oscars jammed into a 5-foot tank is crowded, without even considering the aggression which will likely develop in time. Whittling that down to two if they pair off would be good, but then any other fish you try will suffer attack.

I would suggest cutting way back on your stocking expectations with this tank.

Thanks for the input - Clowns are very slow growing though, so most of mine are around 2 inches, and I have other tanks if they ever need to move. I'm going to get a group of 4-6 juvenile Oscars, and then thin them out as they grow. I plan on having a few other fish in there too, so might just end up with a pair of Oscars, or move the other fish on and end up with 4 Oscars.
 
Maybe i'm interpreting this wrong but it reads to me like you've set up your new 5x2x2 and seeded it with media and had it running for a week.....with no fish in it???? And then you state that your large clowns and pictus are going in tomorrow!!!!! IS THIS CORRECT?

If that tank has been running for a week without fish, or any other ammonia source, your seeded media you put in the tank won't be seeded any more, they may have died off because there hasn't been a food source for the past week. Put your large clowns and pictus in there tomorrow and I guarantee you will, within 48 hrs, have a potential tank wipe out on your hands. The ammonia will sky rocket without sufficient BB numbers.

If i've just read your post wrong forgive me, and ignore my advice, but if i'm right then you need to be extremely careful when adding those fish. And when you say "a few places that came with the tank", do you mean plecos? If so that's a whole lot worse.

So I have been doing water changes on the old tank every 2 days, and putting the water I take out of the established tank in to the new one. I have moved sand, and rocks from the established tank, and I moved half of the filter media from my FX6 into the sump tank on the new one. I will be adding the clowns, pictus and Plecs (2 bristle nose and 1 small common) in there this weekend. I will monitor water quality then add other fish next week if all is good.
 
Silver Dollars are weird. My three Tiger SD/s are jumpy in a 125 with my Geos, but the three Thin Bars in a different 125 in the same room, are super chill and never freak out.

I've only had them once, and it was only for a short time, so maybe they aren't the ones to go for...
 
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