That light should be ok. If the plants are just living and not growing though they won't take up much ammonia.
Plants should be ok at 90 degrees.
Just to rule things out, the tank hasn't ever been cleaned with soap or treated with antibiotics right? A month does seem like a long time. Good luck to you.
Even with no source of seed provided, the bacteria you need are present in low numbers in the environment. Soil from your yard may help, actually. It's definitely possible to cycle a tank without ever adding a source though.
Plants should be ok at 90 degrees.
Just to rule things out, the tank hasn't ever been cleaned with soap or treated with antibiotics right? A month does seem like a long time. Good luck to you.
Even with no source of seed provided, the bacteria you need are present in low numbers in the environment. Soil from your yard may help, actually. It's definitely possible to cycle a tank without ever adding a source though.