Sharing my experience with Water Celery. This is mainly what I use around my rock spires along with some other plants in between them.
I have a question about water celery. My header pond is full of water celery. I have noticed that it is turning yellow and some of the leaves are actually turning brown. It is not planted in pots.
Is this normal for water celery?
I put mine in 4" by 5" pots, but the Water Celery quickly outgrow them. Yeah, I think the leaves browning might be weather. Mine is starting to do that probably due to our cool mornings, 42*F~52*F. The leaves of mine started yellowing quite a while ago, around middle of summer. A greenhouse in Amarillo sold some pond plant stuff,
Bloom & Grow and
Ensure. I
guess this is why they no longer become yellow.
Is my skippy filter doing so well that it is taking more nutrients out of the water and starving the water celery?
Bacteria creates the food fertilizer, that is Nitrates. However, there are heterotrophic nitrate-reducing bacteria, but, from I have skimmed, they really do not oxidize much, very tiny percentage, of the nitrates. I bet ya have plenty of food fertilizer.
From looking at your pictures, I think the Celery kind of laying down like that is normal. When I would periodically trimming mine through summer, it appears each joint, in a branch, will create a new root network when the joint is submerged in water. I think the Celery eventually laying down a bit is natural. Winds especially would cause my Water Celery to lay down quick. I got some anti-rotting yarn to bind around each celery plant to bunch the plant together looking like a shrub. As it grows, getting thicker, I would have to use more yarn. With how I have bunched the plant with yarn, the plant has grown up and out making it so far around 2 foot tall and wide. It appears the roots eventually shoot out branches making it thicker. Big winds really would knock mine down so I got some tall rocks to keep them up straight. The roots grows crazy so much so they almost take over my entire little water garden.
It was doing very well until about 2 weeks ago after the bloom.
Blooms are neat. I didn't expect it. Little bunch of white flowers.