Are dosing levels the same for brackish water as they are for fresh water and what water tests (as unreliable as they may be) are critical with brackish water? Some have suggested NO3 and PO4 are not as much of a problem (algae) as with FW, with frequent water changes. What should I be concerned with as I slowly raise the levels of salinity in a 10 gallon tank? Plants right now are Java fern, Java moss and some water wisteria that just showed up on it's own. I have three bumble bee gobies, two guppies (female has a place to hide from the male under some bog wood) and a few RCS.