Guppygal, I think I mentioned in another post that low KH/PH crash could be responsible for your stalled cycle. Crushed coral, bicarbonate of soda (baking soda) or some form of calcium carbonate can help to raise KH/PH safely, and help keep the cycle going if it's still stalled.
I believe it is the cycling process that consumes KH, and therefore PH drops because the two are tied together. Raising KH will help to buffer the water so that PH is raised and remains stable.
I've heard that a safe starting place would be to add 1 teaspoon of baking soda per 10-15 gallons and then remeasure the KH and PH and go from there. You could add less if you're feeling cautious (ie. mix well with some tank water, add gradually, measure KH/PH after each dose).
Hope this helps.