Are they compatible together?

[dreamon7]

This fish might be a stopgap for phosphate-related hair algae issues, given its diet.

[zenoxa]

While Rainsford's gobies do eat some hair algae, it's not nearly enough to make a dent in the problem. What they really thrive on is the microfauna that filamentous algae provides, that's their main source of food.

[dreamon7]

I'm curious to know, do the Hector's and Rainsford's gobies have similar feeding habits, considering they both seem to have a taste for filamentous algae and 'pods?

[zenoxa]

I'm going to take a guess, though I've no personal experience with Rainsford's gobies.