Those are roundworms, one of the most common worms they can pick up. The praziquantel won't treat those, you will need the Safeguard or Valbazen. I would finish treatment with the praziquantel to make sure you take care of the tapes, and then treat with one of those others to get the roundworm. Roundworm is one of the easiest to pick up in the environment. For tapes, they eat another host, like slugs, worms, cockroach, etc. that is carrying the tapeworm and get infected that way. For roundworm they pick it up scratching and digging and pecking at the ground. The eggs survive a long time in the environment (and every infected bird deposits 1000's of worm eggs back into the environment in every dropping), so reinfection is common. You will need to monitor your birds to see how often you need to treat to keep them healthy. Some can worm once or twice a year and that is enough, some may have to do more often. I have to worm every 3 or 4 months in my flock (Florida climate is very nice to parasites).
Safeguard dose is .25 ml per pound of body weight, orally, treat twice 10 days apart.
Valbazen dose is .5 ml, orally, treat twice 10 days apart, for a standard sized bird. Actual math for dosing Valbazen is "weight in lbs / 2.2 X 20mg / 113.6"