Well Wes, I know you won't be buying from me, but the main difference is in size. Lileaopsis is the shortest, reaching a maximum height of 3". E. tenellus has 2 or three different versions... the most common is cultivated from Florida, is grown emersed and is usually about six inches tall. The micro tenellus is shorter, and is not an official specie...just a name coined by some internet users. There are only two suppliers on the net that sell "Micro tenellus", myself and Fishvet. None of your favorite vendors carry it. The micro variety gets 4 to 5" tall and has a thinner leaf than the florida stuff.
Dwarf Sag has a little wide leaf than tenellus, and grows 6 to 8" tall.
If you do not have at least 2 watts per gallon, (preferably higher) dwarf sag and tenellus will stay much shorter and thinner, spreading very slowly if at all. C02 will help in size. Lilaeopsis needs the highest amount of light of all of them and grows into the thickest lawn like appearance. I wouldn't even try this plant without bright light and C02.
Someone mentioned hairgrass. Eleocharis acicularis is the most common dwarf specie, (but it can grow up to 10" tall) it can be trimmed to any height. Eleocharis parvulus is the shortest dwarf hairgrass, reaching 3 or 4", but it is rarely found in this country. I get it occasionaly.
Dwarf Sag has a little wide leaf than tenellus, and grows 6 to 8" tall.
If you do not have at least 2 watts per gallon, (preferably higher) dwarf sag and tenellus will stay much shorter and thinner, spreading very slowly if at all. C02 will help in size. Lilaeopsis needs the highest amount of light of all of them and grows into the thickest lawn like appearance. I wouldn't even try this plant without bright light and C02.
Someone mentioned hairgrass. Eleocharis acicularis is the most common dwarf specie, (but it can grow up to 10" tall) it can be trimmed to any height. Eleocharis parvulus is the shortest dwarf hairgrass, reaching 3 or 4", but it is rarely found in this country. I get it occasionaly.
