A few notes...
Please keep in mind that Ammo-lock is a temporary fix for a short period of time. The bottle even says to do a water change after two or three applications. Reason being, it only seals the ammonia molecule and then unseals it, releasing the toxicity back into the water. IME, it is much better to use a bio suppliment, this way the ammonia is broken down rather than just temporarily sealed.
pH is way too high for Angels. Also when pH is high with readings of ammonia it makes the ammonia more toxic. Ammonium (NH4+) may be less toxic than NH3
(ammonia), but there's still a level of toxicity and angels are delicate fish. Peat moss will help lower the pH naturally without adding chemicals. You only need a little bit for a ten gallon tank. Test the pH often to make sure it doesn't go too far down (6.5 at the lowest...7.0 is what's preferred). Peat moss is also something you can use to soften the water from your water source prior to adding the water into the tanks.
Now that you have a small tank, convert it into a QT. IME, the QT is best left as empty as possible...no gravel and decor should be non porous...meaning no fabric plants or live plants...plastic only. Use a non porous item to use as a cave or hide out. The filter you have is fine and a simple heater kept at 78 degrees.
What I would suggest for the ten gallon and in order...
Take out the gravel, put in new water with buffered pH, dose the tank with a bio suppliment (nitroMax, cycle, Bacter Plus, etc)...double the dose for the first application and re acclimate the fish to the tank. They can hang in a bucket with an airstone for the time it takes to do this (with the tank water you take out from the ten gallon).
Do 25% water change every other day or every two days until they can go into the main tank. You could also put in half a dose of stress coat into the ten too. Stress coat will help prevent the loss of electrolytes. Feed very sparingly...two minutes worth of food per day, every other day, split into two or more feeds...the more the better. So two minutes divided by two feeds, you would feed one minute worth of food twice a day every other day. If divided into four feeds, it would be 30 seconds worth of food four times a day every other day.
What is the status of the 55 gallon?