After 10+ years of maintaining a 40g heavily planted tank, I'm switching it over to a driftwood and rock-only setup for less maintenance. I don't use activated charcoal in my 75g power filter since I don't want to remove nutrients.so it only contains a sponge to collect debris. Does the following plan sound correct?
1) Move fish (10 pristilla tetras & 3 platys) to 29g. Will use the water from 40g. Use smaller power filter w/charcoal and put established tank's 2 sponges in temp tank. No gravel, but will toss in some old plants to give the fish cover.
2)Clean/scrub out old tank. Add new gravel, cleaned driftwood, rocks, etc. Fill with treated tapwater and turn on heater and big power filter now with new charcoal/sponge cartridge. Put 1 of established tank's sponges that's been in the 20g back it into the 40g.
Have I forgotten anything? How many days do you think this transition process will take? I will be doing ammonia, nitrite and nitrate tests on the new tank and maybe after a couple days of filling the new tank I can add 1 of the platys to it if readings are at 0, and keep testing for a week? Then add 2 more fish and test for a few days, etc? Is a plan for 2 weeks to do the full fish transfer of 13 fish realistic? Maybe after a month remove the old filter sponge and just continue with the charcoal filter cartridges and weekly 20% water changes.
Can it be this straight forward or am I forgetting something? It's been so long since I've set up a new tank!! Thanks in advance for your thoughts!1