[Complexity]

With injected CO2 and EI ferts, you're in pretty good shape. Your lighting is good, but the depth of the tank will take away some of it.

I think you'd be good with basically any low light to medium light plant. I don't think high light plants would do well.

There are so many plants to choose from, it's hard to specify any single plant. I can tell you that one of my favorites is Limnophila hippuroides. I like reds and pinks in my plants, and this one has a beautiful bright, deep pink color. Really stands out, and it's growing very easily in my tank. I've seen reports that it does well with medium light.

I like Crypts as good basic plants because I have found them to be very hardy and they don't require a lot of maintenance. There are so many different kinds of crypts, you can get anything from short to tall to green to bronze/red. Most should do well with your setup.

There are lots of other plants you could use. Check the For Sale or Trade forum for some good deals. Look at other tanks, and when you see a plant you like, check it out.

If there are any specific characteristics you're looking for, if you list them, I'm sure people can give you ideas.

 

[Complexity]

Vicki - he has T5 HOs. Doesn't that put out much more light than regular? At least that's what I understand.

Yes, HO puts out more light. That's reflected in the wattage. My TEK lights on my 75g are T-5 HO which is what I was basing my suggestions on.

From what I understood him to say, he has 4x39w T5 HO lights for a 70g, 25" tall tank. The lights come to 2.23wpg.

I have 4x54w T5 HO lights for a 75g, 20" tall tank. My lights come to 2.88wpg.

When combining his wpg with his exceptionally tall tank, I'm not sure he'll do well with plants that require high light. He might be able to, especially as they grow taller and closer to the lights, but things like high light ground covers may prove challenging.

It's just a guestimate on my part based on my tank. He'll have to experiment to see what plants work well. But just to get started, I think it'll be easier to stick to med light plants and graduate to high light plants later, if he wants. That way, if the high light plants don't work out, he'll still have a great tank of med light plants.

Look under Limnophila Aromatica.

Whoops! Thanks for catching that. I did a quick copy/paste and obviously got the wrong one!

Limnophila aromatica is the plant I was referring to. I got mine from another board's forum similar to this board's "For Sale or Trade" forum. Generally, you'll get great deals and have a much better selection to choose from. Check the seller's feedback (most are great) and ask if they have algae or snails or anything else of concern. Since most people selling in those forums are regulars on the boards, they take great pride in the quality of their plants and fast shipping.

You can buy online and through stores, but to be honest, my best plants have not only come from others on boards, but from the extras they've sent along with the plants I've bought! Not to mention the kindness of a certain Gal in Tex.