I thought I had a black thumb, but as it turns out even I can grow the easy plants. I have blackwater tanks with very low light, high acidity, virtually no nutrients in the water, and no CO2. When I first added the plants, they asked "Why do you hate me?" Once they stabilized and adapted to the conditions, they created a jungle that I need to thin out every couple weeks. For me, grabbing a handful of plants to throw out every once in a while is a lot easier than doubling my
water changes.
If you're willing to be patient and accept some learning curve, there are so many benefits to live plants:
- They are massive net oxygen producers
- They are very efficient at exporting nitrogen (if you keep thinning it out)
- Provide bacteria and inverts to fill out the ecosystem of the tank. Yes, snails, copepods, detritus worms, etc. area all good things.
- Provide substrate for microflora that fish fry and small fish can feed on.
- Provide structure and cover
- Look better than fake.
I only keep easy plants, but even people who keep the finnicky ones start the tanks by adding tons of cheap, fast growing plants (especially floating ones). Why? Because they vastly accelerate and improve the cycle and foster an environment for all plants to grow. Then they throw away the cheap plants as the prettier ones grow in.
Bomb-proof plants:
Salvinia natans, water sprite, anbuias, java fern, java moss, susswassertang, Mayaca fluviatilis. There are others, but I can't imagine these plants failing.