It has been years since I have set up an aquarium. So I was excited when a friend of my son's gave me a 45 Gal aquarium for free. I cleaned it all up and had it running a few days before adding 8 guppies, 5 Neon Tetra's, 4 Red Tetras, 4 Black Tip Tetras, 3 Mollies, 2 Cory-cats, and some live plants. Everything seemed to be doing just well. The live plants I purchased had some bladder snails and at first I thought they would be great, until they started to take over the tank. My son's friend suggested Assassin snails, so I purchased 4 of them and I have seen the Bladder snails decrease quite a bit. However I have noticed that I have white film building on the bottom (that I think may be from my son trying to make sure all the fish get enough food) of the aquarium and have used a gravel cleaner, but it is not pulling all of it out. I purchased 2 Red Cherry Shrimp thinking they would help with the cleanup.
Should I do more gravel cleaning to help eliminate the white film, that looks like tissue attached to the rocks and plants? I am just concerned about upsetting the fish by doing too many cleanings, because with each gravel cleaning I have to also add new water in . How many gravel cleanings are too much?
I noticed one person cleans after every feeding, I was thing maybe once or twice a week, once I get the white film taken care of. I just don't remember having this problem with the fish before.
Any suggestions?
The pic attached is from my aquarium, I had to send it to my self by messenger.

Should I do more gravel cleaning to help eliminate the white film, that looks like tissue attached to the rocks and plants? I am just concerned about upsetting the fish by doing too many cleanings, because with each gravel cleaning I have to also add new water in . How many gravel cleanings are too much?
I noticed one person cleans after every feeding, I was thing maybe once or twice a week, once I get the white film taken care of. I just don't remember having this problem with the fish before.
Any suggestions?
The pic attached is from my aquarium, I had to send it to my self by messenger.
