i don’t think ive ever heard of corals causing an ammonia spike, in fact coral like xenia use up excess tank nutrients, some people even use them as nutrient export filters. do you have anything to back this theory up?

my last system had no skimmer and was very full of shedding soft stuff leathers, fish and crustiations. never had any sort of ammonia or nitrate issues.

My questions are such because I have a 30 gallon tank and I am just wondering if adding corals to my tank will effect to bio load on the system. I have got 5 tiny fish and 20 or so corals mostly just softies and lps but I want to know if adding more frags and such will cause an over load of the system

No , adding more corals shouldn't increace you bio load, as long as you don't over feed them

As for the reply about ammonia feeding algae or causing a bloom or to suggest that algae feeds on NH4/ammonia. That is wrong ,as ammonia is poision! If you don't beleive it , try pouring ammonia in you house plants and see if it helps them grow!
HA Ha

dude you need to start watching more discovery channel or something! ammonia is a key ingredient of fertilizer.

i did for years, i ran a 15,000 tree bonsai nursery, used a lot of fertilizer and pesticides. maybe you should do some more research before you start telling us about how ammonia works.