It had better NOT be litres as it contains an
osphronemus gourami (which get to 30")
Like I've said previously, you'll very soon find you need to upgrade your tank. These fish grow ridiculously fast. Meanwhile, things like clown loaches, silver/bala sharks, common/sailfin plecs and tinfoil barbs are all very common (usualy cheap), large-growing species that should be fine in this size tank permanently with the parrots.
Silver/bala sharks grow to around 12-14" and do best in a group as they are schoolers (3 is fine for this size tank).
Another schooling fish, tinfoil barbs do best in groups and can get to around 12".
Clown loaches also grow to 12" but do so much mroe slowly. They also do best in a group.
If you decide to get a large-growing pleco, make sure you have some bogwood/driftwood in your tank (they need wood in their diet) and only keep one as they preffer to be alone and are territorial. these also grow relatively slow.
Do NOT add all the above - you'll over-stock your tank. Choose only one species and don't over-do it.
I have to emphasise certain things though...
First of all, you posted in another thread that your water quality is not up to scratch -
do not even consider adding more fish until this problem is fixed.
Also, please realise that
the giant gourami CANNOT live in this 130 permanently. If you are caring for it correctly, it'll reach full size much sooner than you expect and you won't get the chance to even
plan and upgrade - so start planning NOW!
