too many plants.....

You should cut off that bloom stalk, Mg.

From Aqualandpetsplus:

Even starter plants will try to bloom. Snip that bloom off as soon as you spot it.

Snip the Bloom of Youth. Other Aponogetons throw up a bloom stalk when they get growing well. If they flower and set seeds, they will wither and die back. Dead head the little rascals before that happens to your lace plant (unless you want to try growing the little guys). If you intend to grow them from seeds, lower your water level and lean back for about four years.​
 
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