Film algae & anemone behavior

[Doglips56]

Ever since we upgraded to our new tank our anemones have been acting strangely. They’ll be big and beautiful and inflated (rainbow bta’s) until I scrape the glass. During or after they kind of bloat up their bodies and then their tentacles deflate and they retract. Sometimes they’ll close. This is new behavior. I’ve had them for over 2 years. Wondering if anyone else has this issue? It never happened in the other tank?
latest parameters:
Temp- 78.7
PH 8.3
dKH - 8.8
PO4 - 0.05
NO3 - 5

lighting LED/T5 hybrid
I do not direct feed, they host clowns, fish are fed a variety of foods including chopped meaty frozen, pellets and cubes containing blood worms and shrimp

All For Reef 5ml twice per day

 

[Timfish]

It's a guess but it sounds to me like they're feeding off the algae by taking in more water then they'll have to deflate to expell the excess water.

 

[Doglips56]

It's a guess but it sounds to me like they're feeding off the algae by taking in more water then they'll have to deflate to expell the excess water.

That’s kind of what we were thinking too but I wanted to see what more experienced people thought

 

[Ghostweim]

Mine do this too. Wasn't sure on why for the behavior. I can't offer up any words of wisdom though - this is my first BTA.

 

[Sink_or_Swim]

It's a guess but it sounds to me like they're feeding off the algae by taking in more water then they'll have to deflate to expell the excess water.

Kind of my thoughts too - my BTA inflates when I broadcast feed Reef Roids to the tank, lol.