Bn and rl plecos exposed to ich

in my quarantine tank I had a balloon molly, one baby rl pleco and one adult bn all in a 5.5 gal (yes I know small but it’s temporary) anyways I noticed the molly has ich I just moved her to my other tank that currently has ich (longgg story) but I’m scared the plecos are going to get it and if so what should I do? Also the molly is currently pregnant since she’s sick will she loose her babies?
I have paragaurd,super ich cure and ich-ex

 

Is this ich!? It looks like white dust on his fins and I don’t know how to treat plecos for ich and I did have a molly in there who had ich but was put in another qt tank.
Tank
What is the water volume of the tank? 10 gal (temporary)
How long has the tank been running? A few months
Does it have a filter?yes sponge filter
Does it have a heater?yes
What is the water temperature?72-74
What is the entire stocking of this tank? 1 bn pleco and 1 rl pleco (Please list all fish and inverts.)

Maintenance
How often do you change the water?once a week
How much of the water do you change?about 50%
What do you use to treat your water?prime
Do you vacuum the substrate or just the water?both

*Parameters - Very Important
Did you cycle your tank before adding fish?
What do you use to test the water?
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.
Ammonia:0
Nitrite:0
Nitrate:20ish (just did a wc)
pH:7.6

Feeding
How often do you feed your fish?once a day
How much do you feed your fish?a piece of vegetable and an algae wafer
What brand of food do you feed your fish?hikari
Do you feed frozen or freeze-dried foods?no

Illness & Symptoms
How long have you had this fish? The rl (in picture) a few weeks and the bn a couple days
How long ago did you first notice these symptoms?today
In a few words, can you explain the symptoms?”white dust looking stuff on fins”
Have you started any treatment for the illness?
Was your fish physically ill or injured upon purchase?I don’t think so
How has its behavior and appearance changed, if at all?my new molly had ich and I just moved her into another tank with ich (long story) and is being treated but today I noticed the white stuff
I forgot to put that I cycled the tank before putting fish in and I use an api master test kit

 

I can't tell if its ick, watch the dots, and if they multiply, then it probably is.

 

I can't tell if its ick, watch the dots, and if they multiply, then it probably is.

What should I use I have aquarium salt,paragaurd,ich x
If it does multiply

 

What should I use I have aquarium salt,paragaurd,ich x
If it does multiply

Ich x was extremely good for me

 

Ich x was extremely good for me

That’s awesome looks like I’ll be using that