I'm not an expert, but I can give you some advice on similar problems I've had with swords in my learning process.
First, how much light do you have over the tank? If the Anubias is doing well (with no algae) and the swords aren't, it's possible that your lighting is inadequate. Even if you have a good bulb, you still need to have enough light for plants like swords.
Second, swords do a lot of root feeding. I put some root tablets in the substrate near mine and noticed a LARGE increase in their growth rate. Another thing that helped with mine is dosing more iron (they seem to suck it up like crazy).
Finally, what type of plecos do you have? Smaller ones could be okay, but some of the "common" types which get very large can damage plants. Your problem sounds more like a nutrient or light deficiency to me though, since it's at the leaf tips. I think plecos would be damaging the leaves all over.
You also might want to check out http://www.csd.net/~cgadd/aqua/art_plant_nutrient.htm if you haven't already. Chuck's page can help you diagnose nutrient deficiency symptoms. Your filtered water could be removing some necessary trace nutrients or something.
First, how much light do you have over the tank? If the Anubias is doing well (with no algae) and the swords aren't, it's possible that your lighting is inadequate. Even if you have a good bulb, you still need to have enough light for plants like swords.
Second, swords do a lot of root feeding. I put some root tablets in the substrate near mine and noticed a LARGE increase in their growth rate. Another thing that helped with mine is dosing more iron (they seem to suck it up like crazy).
Finally, what type of plecos do you have? Smaller ones could be okay, but some of the "common" types which get very large can damage plants. Your problem sounds more like a nutrient or light deficiency to me though, since it's at the leaf tips. I think plecos would be damaging the leaves all over.
You also might want to check out http://www.csd.net/~cgadd/aqua/art_plant_nutrient.htm if you haven't already. Chuck's page can help you diagnose nutrient deficiency symptoms. Your filtered water could be removing some necessary trace nutrients or something.
