No.
The word "ongoing" doesn't have a past tense as it's not a verb.
Ongoing is correct.
ongoing cost
0.1111111 ongoing as a fraction = 1/9
Your continuing business or works in progress are considered your ongoing operations.
Ongoing harm
Strategic market research is an ongoing process.
The dictionary definition of the word "ongoing" is something that is in progress, continuing, or developing. It implies that the activity, situation, or process is ongoing and has not yet been completed or resolved.
Somalia has been subject to an ongoing civil war between far right Islamists and the pro-democracy government. What remains in the delimited country of Somalia consists of dilapidated buildings, broken infrastructure and little or very restricted technologies.
It has been estimated by the Haitian government that over 250,000 homes had been destroyed and 30,000 businesses lost. Estimates on the number of building that are damaged and their state is ongoing. Please see the related link for more information.
Red garden finished on March 14th 2007, thus it is not an ongoing anime.
Right now dubbed is at episode 205 (ongoing) and subbed is at 516 (ongoing).