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Looks to me like a sword plant, probably Echinodorus bleheri, but there are many. Don't get disheartened if this one melts away and regrows from the ashes, they tend to be grown emmersed in the farms and have to make new underwater leaves. On the left is a ludwegia and on the right a bacopa.
More of the bacopa, probably caroliana, and some Egreria Densa (or one of the similar plants)
Looks like a Cryptocoryne wendtii 'Tropica' with the Egreria again.
Another crypt, probably a wenditii brown.
Is a Lilaeopsis. Not sure which.