Whatever it is, it's good stuff.
More changes:
All the Riccia became populated with the brown mossy algae so combined with a reduced light and fert. programme to convert the tank to more low tech, I removed it so the other plants could have the light. The windelov continues to recover, much to my relief, and all the other plants are doing well. Twisted val I bought recently is a bit floppy and transparent, could be because it was in a darkish corner, so hopefully that will perk up soon.
In addition to this, over the last week the dynamics in the tank have changed. There are about 4 fry big enough to eat a small or half a bloodworm so competition has come back to dinner time. This may be the reason, or a getting older and grumpy perhaps, but the female has become as bolshy as the big female I used to have, and now chases the male away and bosses him more than before. He is now as large as the bigger male I had. He can often be found hiding it seems, in among the plants.
I can't tell if my eyes are playing tricks on me, but I think that either my big male fry has *gone* or he's reduced his colouring as he's getting older. At one point it seemed that there was an obvious male fry, now I'm not so sure. Also with removing the riccia there are less fry at the top except so the chances of getting all the big ones together are reduced. I have made a small mop of christmas moss that is floating in the ex-riccia corner but it's not big enough for too many of them to hide in. Still plenty of moss attached to the driftwood however.
Photos to come.