O Boy - i wish you haven't said anything about the RODI b/c now all the RODI mob in this forum will come out as people are pretty divided lolol (there was quite an intense debate on this a few months ago here). But, i think everyone will agree that whether or not RODI is necessary really depends on how clean your tap is. Ie, there are many that have very successful reefs running tap water + dechlor b/c they are lucky to have 1) good source and 2) modern plumbing for their house that doesn't leak copper back into the water. @SaltISlife and @Sleeping Giant are two examples of using tab and having amazing tanks. For the rest, RODI is more a necessity.Yes sir. I just wanna make sure and do it right. Can't lie, I am nervous.. Haha.. I also don't have an RODI system for water changes, etc..
I just looked over your water report for Moore, OK, here:
EWG's Tap Water Database: What's in Your Drinking Water?
Look up your local water system to find out which pollutants might be of concern, and find suggestions on the best kinds of home filters to remove those chemicals.
unfortunately looks like your tap (even if assuming your house's plumbing doesn't leak copper) is not the most ideal for reef keeping - the nitrate levels aside, it looks like many of the heavy metal contaminants are also above guidelines for human consumption. many of these are absolutely toxic for marine life. These may be safe for human consumption but remember a fish is on avg 400x smaller biomass than human so it's like they are experiencing something thats 400x more concentrated, plus they are constantly in it.
If funds allow, i would really recommend a RODI for you. Pre-mixed salt water may not be a good option since you have a 45G.


