Rypark
Puri madha and Bali coral does not have website, you may need to call them, or as kathy said just go show - very unlikely you'll not get the room, though the choice may be limited. The rate that you mentioned was for their old no a/c room, a bit rustic. Their new bungallow is nice; don't know the cost; but sure much more expensive.diving.
Puri Madha's nicer bungalows have hot water/ac and are newly renovated and come with luxuries like nicer breakfast & towels I think they cost $22-$25 US the price varies with season & number of tourists. They have a nice porch which faces the ocean
The cheaper rooms are very basic, cold water, simple bed, no AC. The price ranges from $7-10 depending on season. They also have a little front porch and come with a simple breakfast.
Inexpensive lunch is easy to find at the cafe within the public scuba access park.