Well black spots on an african is black spot. seriously!! U can only treat that with cooper salts.. AND that is another dangerouse drug. SO right now DO NOTHING as they are not a serious problem like the ICH but can get their later.
NOW ON doing your 10 gal tank, U do need to do a 3 gal water change ASAP!! But I would wait until U move the fish to the new tank to really clean the gravel. AND not use anything from the 10gal. just empty it out and really wash the gravel in hot water and trash it or put it in a container/other and mark it as used but washed good.. ( I use old/bad gravel in my flower pots! just a suggestion)
HOW big of a tank are U getting?? On a tank bigger than a 29gal U need 2 filters. ON a 55gal I run 2 Emperor 400..
Filter your tank 10x the gallons or close too.. Bio-Wheel filters are the best U can have for a tank. they help with cycling and getting your good bio started faster. ON LINE is cheaper for a Emperor if U go that route. Other filters too..
YES U need to VAC the gravel EVERYTIME U do a w/change!!
Also the filter need to be cleaned. Concider the filter as the tolit of the tank.. U wil totally remove it EVERY OTHER week to clean it!! (africans only need it cleaned by-weekly, not weekly) they are great at eating most foods.
some tips from an OLD tank ot a NEW tank:
IF U ARE USING THE EXCISTING GRAVEL IN THE LARGER TANK and it was RUNNING before the trear down,, it has good bacterial in it to help U RECYCLE the tank faster!! IF the gravel has not dryed out, U can just reuse it. DO NOT clean it with tap water!! this distroys all good bacteria. IF the gravel is dryed out, then U can go ahead and clean it or do a different substrate U want in the tank, but the tank is going to have to CYCLE back from everything being NEW..
IF the larger tank is running right now, then remove as much water as U can SAVE without disturbing the gravel!! Then VAC the gravel good and use it as is.. IF the tank is staying put and U are just adding in the fish, then great!!
DO NOT USE ANY PART FROM THE 10GAL!! WATER/GRAVEL.. U can do the deco but I would clean it good under hot tap water to kill out most parasites that might be on it. This way U know U are starting out fresh and U left most bads back in the 10gal. just clean the 10gal good and keep it handy for other later on. DO NOT reuse the gravel.
sound OK?? I wil get U a link on treating black spot. See secound picture.. is this what your fish have?? IF Not then let me know..
http://www.drsfostersmith.com/pic/artic ... d=&aid=443U need ot follow the directions ON the meds U GET. I use Aqua Sol in my tanks. it is a monthly med OR U can do it daily. . ONE TIME and U are set..works great for many problems..
http://www.drsfostersmith.com/product/p ... catid=4720