The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
There's an app u can get that tells u how much room u have or if u are over stocked, think it's called aquarium life or something? Just search aquarium in App Store.
You can enter the size of the tank, select the type of filter and enter the number and types of inhabitants into an calculator at AqAdvisor.
It will let you know how much capacity you have, how adequate (roughly) the filtration is, how much water you should be changing (weekly), and any conflicts that may arise from the stocking you have provided. Check it out.
Without using the tool, the pleco, red tail shark, and angel fish are too small for that tank. The 29g will probably be too small for them as well.
Also, mixing Tropicals and cold water fish (goldfish) is not always a good idea. Goldfish produce a large amount of waste and require a generous amount of space themselves.