You're ready for a cleanup crew. Throw in ( alright, alright, after acclimating properly ) about 15 hermit crabs and let them have a Field Day with them there decomposing shrimp. That should make the little bas... I mean inverts happy for a while. Then toss in a few large pellets of Formula One a couple times a week to keep the little, cannibal bas... I mean crabs from killing each other. This extra bioload and nutrient input will continue building your beneficial nitrifying/denitrifying bacteria populations. Which is what a cycle is. You never actually stop cycling a tank. It is a dynamic system based entirely on the amount of nutrient input and the amount of suitable environment (surface area and oxygen level ) for the different bacteria.
Who told you to throw dead shrimp in your tank? That's just nasty!! LOL
Don't do the initail cycle with cheap and vicious little fish either. Use the hermits. They eat. They poop. They cycle your tank. They are stupid and slow and easy to catch. And it's fun to watch them beat each other up. And you will grow to hate them as I do some day. And on that day, banish them from thine sight and toss them into thine refugium where they will happily consume all of thine tank's wastes without tossing thine frags about.
And there was nitrite in your tank, ever so briefly, during and after all the ammonia was being consumed. You can't have nitrate without nitrite. No, sir. And it is still being produced in your tank as you read this. And it always will be. It's just that you already have such a good colony of bacteria established that they processed it the moment it was created. These bacteria are very opportunistic, and the moment you set the table, they eat.
You have already "Cured, Seeded, and Cycled" your rock, and hence your tank. Now the colonies need to be built up to support greater and greater bioloads. You will do this by adding the hermits and feeding the little, ingrate bas... I mean hermit crabs.
After a week or so start adding Cerith snails. They will work your sandbed. They will consume film algaes and detritus. They will eat the algae off the glass under the level of the sandbed like magic. They will fall off the sides of your tank and lay on the sand until you flip them over with a stick or the hermits kill them and take their shells.
What light cycle are you currently running? I'd advise actinics only until your coralline starts to take off. The coralline algae will protect the surface of your live rock from most nuisance algae. GARF recommends running actinic only for 2 weeks straight 24hrs a day. I tried it. No problems. Good bit of film algae on the glass that I let the Cerith and Astrea snails consume. I didn't clean it off. I figured that I would rather have it developing on the glass than the rock; and if it was growing on the glass, then it was consuming nutrients that might otherwise feed outbreaks on the rock. The snails loved it. Piece of cake to clean with a Magfloat at the end of the two weeks.
Then I spent two more weeks gradually bringing up the daylight and the dark cycles. I added an hour of daylight and 12 hours later an hour of darkness every day until I reached the cycle I wanted. Calculate your desired cycle, and use half hours for the first few days to make the process last two weeks. This will gradually increase the population of photosynthetic organisms and help to control any population explosions or pH swings. Your rocks have been in the dark for a long time. Bring them back into the light slowly.
Man. I envy your tank already. Except for them nasty shrimp. Yish!!
Glad to hear your back is better. Go easy on the aquascaping. It's always murder on both my back and my blood pressure.
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