Well, I can't pick up the Electrolyte solution until tomorrow, which is really frustrating.
That's a ton of info on forcefeeding
Bumpy's body appears mostly OK, actually. However, the twitch is still there, she now seems to drag her leg along a bit when she walks, which leads me to fear she's developed a full case of MBD. However, she's swimming strong.
I'll be honest, the way I do it, I'm not sure whether I've hurt her or not

I usually first take her and put a cloth around her waist, covering the legs. I then gently push the credit card in her mouth, and she'll open her mouth after a few seconds for about a half a second. I plop the cricket in then, and withdraw the credit card. However, I've been stressed the first 2 times I've done this, so I'll try using a calm tone and talking quietly to her, and I'll use something other than a credit card.
I actually tried letting the crickets crawl around in her hospital tank last night, for the whole night, and she didn't even go for them. She seemed too scared. I'm going to see if I can put a black kind of wallpaper around the hospital tanks sides and back.
Earlier, I forcefed her 1 calcium dusted cricket. I'm too worried it'll stress her out to forcefeed her more today. I absolutely
HATE doing it, and I'm sure she does too.
I do have this on hand, is this the liquid calcium you're talking about?:
Exo-Terra Reptile Calcimize Calcium Water Conditioner -3.3oz PT 1971 | eBay
I'm afraid I transferred her to the 30 Gallon just about an hour and a half ago, hoping she'll do better in there, but after hearing this, I'm going to move her back. That was a stupid move of mine. As for the bio-filter, the 30 Gallon has an amazing filter and bio-filter. The water has never, ever gotten even the slightest bit murky. The filter for the 20 gallon is a terrible, weak thing. I am planning to get a proper one as soon as I can.
As for the possibility of a parasite, I don't have the money to get a vet treatment. And it's a shame, because about a month and a half ago I was thinking of treating both of them when I had the money
On the concern for Gnag, she gets more than she needs. I've begun dusting her crickets every other day, I feed her big earthworms from my compost (we don't use pesticides, and I don't know where to buy earthworms) on occasion, and I'm going to give her a multi-vitamin cricket dust at the end of this week. Honestly, if I am concerned about any one of my amphibians getting sick, Gnag would be the least concern. She's a happy, healthy, and chubby frog. Even so, I'll treat her for parasites when I can.