Written on the PFK website, in response to the comments by the staff.
"Will the extra recommended fish survive the piranha, and the plants survive one hungry L191 and 100 Otos?"
Would the fish survive the Piranha? Of course they will, Piranha feed on sick or dying fish, any healthy fish will have enough place to hide and swim. One month in, no issues. Not to mention that the Piranhas were there before with the fish, with less hardscape.
The L191 does not eat plants, or algae, they eat wood.
100 Otos for a tank this large is nothing to worry about.
So is the tank going to be full of algae, or will the Otos starve? I do think that the Otos will thrive in such a tank.
Regarding how are plants being fed... if only root balls existed. Ah yes, they do.
On the wood logs there is moss, ferns and anubias.
At the back there are echinodorus, and it is there that CO2 as setup, running 24/7, at least to give them a chance to reach the top and break the water.
What it really matters is that the public is happy with the tank, the Sea Life center is happy with the scape, and the fish are healthy.
One month in, plants are still thriving, so obviously something is working.