Would it be beneficial to have CO2? I could make a DIY CO2 injector, if needed, but I read it's only necessary for densely, high light plants.
What type of lighting do you have?
The lights are 1WPG.
It's up to you really. I run CO2 injection with 1.4WPG, but this allows me to cheat and grow some more light demanding plants than I otherwise would be able to without injection. Your growth is going to be slow, but that's not necessarily a bad thing. One needn't be dazzled with rampant growth.
I also think you should revise your planned stocking. Instead of the below:
My 29g Fish Tank:
3 Corydoras schwartzi
3 Harlequin Rasboras
6 Rosy Barbs
2 German Blue Rams(I hope they are m/f)
Soon to add:
3 Harlequin Rasboras
4-5 Corydoras paleatus
6 Cardinal Tetras
Try this instead:
Increase the Corydoras schwartzi to 6. They do much better in larger groups
Increase the Harlequin rasboras to 8. They also do better in larger groups.
Keep the Rosy barbs or reduce down to one trio.
Keep the rams for entertainment, especially if they are a pair.
Add a surface dwelling fish of some type, if you wish, but wait until the tank's older. You have too much in the middle levels and bottom levels. A surface dwelling fish will even things out quite a bit. The overstocking doesn't bother me so much. All my tanks are plenty overstocked, an advantage to having lots of plants, good maintenance, and good filtration. You just want to make sure you have activity in all levels of the aquarium. A good choice are a trio of platies, which should provide your rams with some live food that'll keep them in good breeding condition.
Above all, add lots and lots more plants. There's always room for more. Also, bear in mind, rosy barbs are messy, you may not need extra fertilisation with your bioload. Just some things to consider.
llj
