hi and welcome first off with the saltwater look into the equipment and products vary good as if you buy crappy equipment you will prob. have to re-buy stuff so if you are looking to get something ask here as everyone here can help.
now with the fresh water most fish leave plecos alone but if...
ya a tang is too small unless you plan on upgrading your tank soon. also how old is your test kit i know if thay are pritty old thay tend to miss read you should take some of your water to your lfs and have them test it to see if its on point
wow i would bug out if that happend to me lol! dont you have a mandarin? thay are pritty slow i might worry about him but it may be fine if you keep him fed vary well
whats up guys im looking at buying this light if its still for sale for my 100gal tank im working on and its cheep $100:bounce: its a 4 bulb t5 its going to be a FOWLR but if i can grow something decent why not try:Cheers:
question is what will i be able to grow? the tank is 30" tall