Thanks for all the info.

Maybe I can fill the new tank to half and try growing anubias
so it fills all the tank. I will cover since i notice that the
leaves dry out quickly when they stick out. Would they benefit
with the diy co2 in emersed state?

Thanks again.

In article , liew26302
@pacific.net.sg says...
"Emersed" in this case means having the leaves of the plant above (not on)
the water surface. If the room (or gardern) where you place the growing tank
is humid, the leaves and flowers should not dry-out. If you live in an area
with low humidity, you can probably place a sheet of transparent glass or
acrylic over the growing tank to trap water vapour for 2 days before moving
in the Anubias. Keep the sheet there until your Anuibas has grown out its
leaves to the specific size you want. Wipe off any condensation on the sheet
daily.

Anubias are tropical plants that live in flood-prone areas. Their most
active gowing periods are when they are emersed and during this time they
also store more nutrients in their rhizome than when emersed. When the
floods come, the plant growth slows down and the plant uses the stored food
behaves like any submersed normal plants (like crypts) but with all taht
stored food, it can grow better.

When I said "normal" I was refering to typical fertilisers for indoor house
plants with macronutrients. The reason why normal fertilisers is used
instead of the aquarium version is that in a growing tank with no fishes,
there is no macronutrient supply. (Nitrogen, Phosphate and Potassium comes
mainly from fish food in aquariums.) If you worry about algae problem in
your growing tank (actually, for this purpose, a pot will do), place a
styrofoam board with a large slit over the rhizome for the leaves floating
in this manner to reduce algae growth:

Glass/ Transparent Acrylic Sheet
|===========================|
| |
| +++ |
| +++++ |
| Leaves +++++++ |
| +++++++ |
| ++++++ | Pot
| +++++ |
| +++ |
| | |
|Styrofoam | Styrofoam|
|XXXXX........................|.......XXXXXX|
| Rhizome ... | .... |
| ...... | ... | -----|--------Water
| \/ ..... | |
| ////////////////////////////// |
| ////////////////////////////00000 ..... |
| 00000000000000000000 |
|___00000000000 Rock 00000 0000.__|

By placing fertilisers containg macronutrients in the water, there is no
need for any substrate (or else, the roots may get stuck again). Try putting
in only a 1/4 of the recommended amount
stated on the label and only increase the amount slowly with complete water