The ordinary procedure in an equity case shall apply to an action brought under the provisions of this chapter. The court shall include in its decree such provision as will permit such period of redemption from execution sale as may be necessary to give to those entitled to redeem at least as long a period of redemption as they would have had if the foreclosure of tax lien in question had been valid in all respects and tax deed thereunder had been applied for at the earliest date permitted under statutes with reference to procuring tax deeds under tax lien foreclosures. The remedy provided by this chapter shall be cumulative and in addition to all other remedies and shall not be held to impair or detract from any other remedy provided by any other statute or statutes.