I recently bought a 55 gallon tank from my local shop before really doing any research on water (lol) im now informed that RODI water is beneficial to your tanks life, I filled my tank with tap water, added live sand, and then a solution of start and marine stabilizer. I plan to buy live and dry rock tomorrow and let a shrimp decay in my tank for a day or so, will I be ok to leave that water and then buy AN RODI system in the next two weeks and do a water change about three weeks from now before adding fish to my tank? thanks !