Clown Loaches are really, really sensitive. They are not what I would call a beginner fish, and they don't do well in poor water conditions. Just because they are alive, doesn't always mean they are strong or doing well.
A typical 30 gallon tank takes 4-6 weeks to cycle.
What type of filter(s) do you have on this tank? Are you using Carbon cartridges? Is there gravel or sand in the tank? What is your flow rate?
If you are successfully turning your tank over a decent amount of times each hour 3+, then you can look for it to cycle in 4-6, maybe 8 weeks.
I suggest taking your clown loaches out, and putting them back in the other tank you had them in for time being. Then, I would do a complete water change and use some seeded filter material from another tank (provided the tank is healthy) and slap that on, and let it do it's thing. Don't add any fish, just be patient and let it cycle... properly...
If you do not have any seeded media available, then you can cycle the tank with household ammonia.