This is meant with the best of intentions,
thanks so much for your help. is there some calculation to find harmful ammonia levels opposed to the less harmful locked ammonia? my tank details are.. 60L, 4x 4cm clown loaches, 1x dwarf gourami and 2x tiny yoyo loaches. no dead fish. not overfeeding. i always remove uneaten food and tank is super clean.
You may need a bigger tank! I would suggest just for the clowns something quite a lot bigger. If they are housed in a tank that is too small for too long stunting will occur which will lead to deformities of internal organs, the liver in particular, this will lead to a premature death.
(Sorry that sounds morbid, just saying)
The yo yo loach Botia lohachata (almorhae) by my experience will also do better in a larger system, ( I gave mine to a friend when I moved, they were much more active on that bigger system than they ever were in mine) 36x15x15 moved into 48x15x36, the footprint 48x15 would be my minimum suggestion for these.
Tank is ideal for the dwarf gourami though.
Ammo lock gives a false reading, while in use there is not really any point using an ammo test. (I'm biased, I'm against chemical wonders)
http://www.aquariumadvice.com/forums/f29/clown-loach-botia-macracantha-submitted-by-sudz-62119.html
My first clowns (Chromobotia macracanthus) were housed in 36x18x18 this was ok for about three years (first a pair then I added 3 more.)
Then I upgraded to a more suitable sized tank for life (+6more clowns.)
When I moved I built them a temporary tank at 5ftx18x18 they were not really happy in that system.
(11 clowns from 4" to 8" age 6-10 estimate, my care 5-8years)
You want at least five (commonly suggested shoal size) but, they are much better with more numbers, giving you an unbeatable show everyday that is still fascinating years later.
Bloodworm is essential. Prevents skinny disease, fish waste away and die.
I feed daily with bloodworm+extra food for variety, spirulina, catfish pellets, algae wafers(hikari), daphnia, mosquito larvae (black/white)
Currently the shoal eats at least 6cubes of bloodworm everyday, this amounts to about 95 packs per year.
Finally, if you are removing uneaten food, you are over feeding, cut back by the amount you remove, hungry fish is a happy fish.
(Feeding by my experience is the hardest thing to get right)