[tang daddy]

Some people do up to 50% waterchange without the tank going through a cycle, adding 5g of water to the tank isn't going to make it cycle, although disturbing the substrate may cause more of a cycle than anything else.

A few tips on transferring the tank: (some might be the same as most have suggested)

- remove rocks and corals into a bucket or container, while doing this drain 40% of the water into the holding tank.

- another bucket drain another 4g of tank water and catch fish and inverts and place them into the bucket.

- leave about 5% of water and sand, clean sand with hand by mixing it up then drain the water as much as you can and dispose it.

- remove sand and place it in new tank, scape the tank with lr.

- pump water back into the tank from container holding corals and lr, when doing this step use a saucer or shallow plate in the tank and put your finger over the tube to regulate flow returning the seeded tank water. The idea is to let the water slowly diffuse on the saucer or plate so that you disturb the substarte as little as possible.

- return corals back into the tank, then add fish and remaining water.

-Have your premixed saltwater and top off the tank!

If you really want to you can add the new saltwater abit over the span of a week essentially it's like doing a water change every other day, if it was me I'd do it all at once.

As for the MH I would say it's ok to use it now because the days are cooler, but watch out when summer arrives as your tank will easily hit high 20s unless your suite has AC.

Good luck with the transfer!