09-03-2010, 05:59 PM
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Agree with redchigh, but also as this is a new tank the yellowing can be normal when plants are moved. As you mention swords, I suspect this is the reason. And you ordered these from SA I believe? Which means they are probably grown emersed (most nurseries grow bog plants emersed because it is faster and less expensive). If you read the profile of the sword species you have, you will see the explanation without my having to repeat all that here. The profile will tell you how to ensure all is well.
This algae, is is green or brown? Brown (diatoms) is normal in new tanks, usually during the first 3-4 months, then it dissipates and you should never see it again. Green algae is normal, but an excess means there is too much light. This is explained in the series "A Basic Approach to the Natural Planted Aquarium" stickied above. It is mentioned in a couple parts. However, be aware that in a new setup it takes a few months for the biological equilibrium to establish, and during this period algae may well be a pest. So don't be too drastic in measures to deal with what is normally a temporary issue--although it can become permanent if everything is not balanced.
With the named fish species, I would lower the temperature to 77-78F. A temp of 79-80 is very high for neons and most corys (C. sterbai is about the only normally-seen species that manages well at 80+) and while Angels can be OK, the commercially-raised ones will do just as fine with 77-78F as it mentions in the profile. Wild angels need warmth, not tank-raised angels. And gourami similar, unless you have th rarer species (Chocolates, etc).