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I have tried to grow Anubias congensis twice now. Each time, whether it was 12 in. tall or 8 in. tall the new leaves only grew to be about 3 or 4 in. tall. Why is this? The light is low, the rhizome was planted above the gravel, weekly water changes. I have very good luck with my Anubias barteri's, A. lanceolata's, A. moliwe, A. coffefolia. The barteri flower about every other month and for the first time ever my A. coffefolia is just about to open a flower up. The coffefolia has been in the tank for 2 years now(almost algae free i might add). All of them are under the same conditions- planted in the gravel with the rhizome above the gravel.

Leaf size is dependent on conditions. Light, Co2 , Nutrients.

The 8in Congensis were probably grown in richer conditions, so grew bigger leaves.

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Some days you're the pigeon and some days you're the statue.

Remember that age and treachery will always triumph over youth and ability.

The tank does only have one watt per gallon, no ferts added and no CO2. Are you saying that A. congensis is a type of Anubias that likes higher levels of light as opposed to A. barteri or A. coffefolia? If so, how high?

All anubias like and do well with more light and co2/nutrients. The same can be said of any plant.

The Anubias don't need it though. But they will grow faster and bigger if these things are provided , again something that can be said of any plant.

They will do fine in your current set-up but don't expect large foliage or fast growth.

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Some days you're the pigeon and some days you're the statue.

Remember that age and treachery will always triumph over youth and ability.

I've found that my largest congensis do best nearer the light, and I have a tank with relatively high nitrates, though I don't dose with any other ferts (I just have a high fish load). Some of mine have developed into very tall plants with very tall, broad leaves under those conditions.

Hoping that there must be a word for everything I mean...