Increasing your temp slightly can accelerate the Ich lifecycle and get you to the Tomont stage a little faster.
However, with increased temperature comes lower oxygen capicity in the water column, shouldn't be huge as the Salinity being low will counter balance this, but caution should be excercised.
If fish are still eating, soaking some good quality frozen food in a mix of Seachem Metronidazole and Focus, plus some Garlic Guard before feeding can help bolster the immune system and fight off the infection and any secondary issues that may occur.
Soaking some seaweed in Paraguard and Garlic Guard doesn't hurt either.