I forwarded this to Wendy, here a the office. She replied with:
Without any other information it’s hard to say.
From a general perspective, If they feel it’s too much water energy, they could bring in more Wood element to weaken the water or Earth to control it. As it sounds as if the aquariums are going to stay where they are, that’s probably the best approach.
If it’s more of a concern about the flying stars, we’d need to know what’s there to suggest any offsets or compensations.
All the best, Shawn