I know nothing about saltwater tanks, but I would think this would apply for both SW
I personallly think that any chemicals that claim to remove/neutralize ammonia and/or nitrites is never good for your tank. I would imagine that it would also give you false positive readings during your water tests. Besides, by using such chemicals, your only masking your true tank problems, such as overfeeding and possibly overstocking.
, the best way to reduce or remove ammonia and nitrites, are water changes.