I think something is weird when H balsamica does not grow well but R wallichi and T fluvitalis does.

The only obvious thing might be cycling between good and bad CO2 each day etc or if things(CO2 declines and you tweak it a bit later.

Otherwise, perhaps copper in the tap water etc might be the issue.
Good large water changes, good CO2, etc ought to help a lot.

H balsmaica grows like a weed once it gets going.
Hard or soft water, inert substrates like EC, flourite, sand, SMS, ADA AS etc.
The only reason if you dose the EI nutrients you are left with is CO2.

From there it goes to tap water metals like copper.
But generally it is something we overlook when trying to figure it out.


Regards,
Tom Barr