Some of the tube plants petco sells ARE aquatic. The ones I know of for sure are:
- Java fern (labeled as 'tropica fern') - This plant is almost indestructible. Low light (both of mine survive with just ambient room light), no ferts, co2, or anything fancy needed. Doesnt need much more care than a plastic plant really...
- Hygrophelia Corymbosa (labeled as 'compacta') - An absolutely BEAUTIFUL plant. Fast grower. is more demanding of light and nutrients.
- Wisteria: another easy plant. Probably will benefit from more light and nutrients.
- Anubias: similar in care and hardiness to java fern.
I might go back to a planted tank... only using anubias and java ferns